Hello Anton,
Hi Henning
Thank you very much for your well-written and detailed response. Everything you say is of course spot-on.
you're welcome.
I think it's safe to say that, as slide-film enthusiasts, we all agree regarding the inherent qualities of slide film and the advantages of using it. However, the issue here is how likely a significant proportion of current as well as potential film-users will look at it this way. A lot of "education" could help, but consumers tend to respond strongly to the prices they see on shelves or web pages. Confronted with a price of $3.50 as opposed to $10.00, I doubt that a large proportion of the film-buying public will go for the latter.
I am much more optimistic concerning that aspect. And I will prove it:
The photographer see the 3.50$ for an amateur CN film, 7,50$ for a professional CN film, and 10$ for the reversal film (just to use your example).
And next to all that he sees the prices for instant film: 13$ up to about 24$. For significantly less exposures compared to 36exp 135 film.
Instant film has the highest costs per shot. Significantly higher compared to both negative and reversal film.
Nevertheless instant film (both Impossible and Fujifilm) has increasing demand for years. Fujifilm has sold about 6.5 million (!!) Instax cameras in the last fiscal year. No other camera type has been so successful (the whole DSLM market with about 10 manufacturers feeding that market has less than half (!) of that volume).
They are currently selling more than 30 million Instax films p.a.
So price alone is not a hurdle. If people think it is worth it, they will buy it.
And if photographers get better education of the numerous unique characteristics of reversal film, they will see that this medium delivers an excellent price-performance ratio and is worth to be used.
Another factor to consider is the very forgiving nature of color negative film. Users who aren't as knowledgeable and as careful with exposure as is required by slide film, are bound to be disappointed.
I think this aspect is very much overrated. Because
1. For decades dozens of millions of photographers used reversal film and have got good results. And that with
much worse cameras and light meters compared to what we have today.
I started shooting reversal film at the age of 14, with a Nikon FM. There were no computers and no internet at that time. And therefore no "experts" who could tell me that exposing reversal film is "so difficult". I've just used it, got very good results and enjoyed it. Period. I was a lucky kid

.
Today lots of people (most with no real own experience in shooting slides) behave like you would need an IQ of 140 and a PhD to be able to expose reversal film.....which is of course total nonsense.
Every normal guy can expose slide film properly. And even if you don't know the very simple basics of correct exposure and don't want to learn them: Just take a modern film camera with matrix / multi-segment metering and you will get very good results in 99% of your shots. Such cameras like Nikon F90X, F80, F100, Dynax 7, EOS 30/33v, EOS 3 etc. are ridiculously cheap on the used market.
2. You have a wider exposure latitude with negative film. But you
don't have a general wider latitude concerning
all the other relevant quality parameters! If you underexpose negative film more than 0.5 stops, you will have visible degrading quality concerning grain (coarser), resolution, sharpness, shadow detail, colour rendition. And if you overexpose colour negative film more than about 2/3 stops, you will have less resolution, sharpness, highlight detail, colour accuracy (getting colour shifts). I will not go in further detail here, we have the other subforum for that topic.
So, if you want the best overall results - concerning all important quality parameters - you have to expose correctly. No matter whether you have reversal film or negative film (or digital). There is almost no difference concerning the exposure aspects between the mediums if you want optimal results.
A problem? No, not at all. Because we have today so much sophisticated and excellent light metering and exposing technology and options (both with build-in and external light meters) that correct exposure is very easy to obtain, including beginners.
Your points regarding the versatility of slides with regards to viewing are, once again, obvious and important to enthusiasts. But I'm pretty sure that small prints that can be carried in an envelope and passed around, or viewed on anything from a desktop computer to a cell phone, are perceived as more convenient -
Well, concerning convenience:
1. In the situations I want / need convenience, I mostly use reversal film instead of negative film because it is more convenient. The result is finished after development, and I don't need to go to my darkroom to make prints as with my negative films or need to makes scans of the negatives.
And I often show my slides to others in a very fast and convenient way (family, friends) by using an excellent slide loup and the small Kaiser LED slimite plano light-box: This set is much smaller and lighter than a laptop, can be used with and without power from a grid. The handling is very similar to viewing pictures on a tablet. But the quality of the slides is much much better.
http://kaiser-fototechnik.de/en/produkte/2_1_produktanzeige.asp?nr=2453
This is a very convenient (and extremely cheap) way to show slides to others, at home and at all other locations. I am organising film photographer meetings regularly. And I have always the loupe and light-box with me, presenting slides. There is always a huge "wow, what an incredible quality" when new, young photographers see that the first time in their live.
2. Yes, there are probably hundreds of millions of people, who prefer convenience to quality. But there are also dozens of millions of people who prefer quality to convenience. And this group is the market for film photography in general:
Is developing BW film and printing it optically convenient? No, but it delivers outstanding results and is a lot of fun. The demand for BW film is increasing, despite of being not very convenient.
Is shooting instant film (e.g. compared to using a smartphone or a digital compact camera) convenient? No, it is not. Despite that there is a huge boom in instant photography.
Summary:
The "convenience addicts" are not the main target market for film photography. And honestly: We don't need them. There are more than enough other people with different preferences out there to feed a sustainable long term film revival.
Best regards,
Henning