I've always considered two formats to be ideal for any 8x10 or 11x14 enlargements without much cropping, the 6x7 and 4x5. I think the 6x7 I had probably approaches 4x5 quality, depending on film.
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That's correct. There is not a lot to be gained using 4x5 over 6x7 in making enlargements (especially if you don't
ever print large!) but a lot lost if it becomes your
only format when everything has to be slowed down. Apart from 4x5 being inherently slow, methodical, paced and tedious by intent (many people like this and embrace it, but could you... can others?), it is not necessarily, not always,
the best format for everybody to move up to, and I've known people to become frustrated and angry and move back to medium format (or even, shock-horror, digital). Your perception that viewing an image upside down and back to front could be challenging is partly right, at least in the early stages of of experience with 4x5. But what about focusing in poor light? Or adjusting movements under threat of a drenching storm? Even a Tachihara and 90/4.5 SA won't get you over the line with ease in the dark, sublime beauty and constant dripping of a rainforest (OK, so you don't have them up there in Tennessee!

). It's easy to make mistakes with loaded/unloaded film holders, accidental exposures etc., but much harder to stuff things up with a 6x7 or some other format you are long-experienced with. I have yet to be fully convinced of the usefulness or idealism of 4x5, even as I am printing up to more than a half-metre tall from 6x7 transparencies. I do not buy this sport of producing incy-wincy prints in the darkroom from romantically idealised equipment costing thousands and never printing anything biggger than A5 of A4 which seems so very common in exhibitions. I handled the 45CF recently and thought it was a novel piece of engineering. But then along came an Ebony SV45TI. Now
that is a sight to behold (moreso it's cost...). Choices, choices, choices. If you can find somebody around you using 4x5, that would be a golden opportunity to get a hands-on learning stint with that is essentially a camera far removed from medium format. The video you posted is a great reference!