I've barely used cash since the start of the pandemic, when the few remaining small businesses that didn't have card readers all got them because there was a worry about cash being passed to multiple hands causing spread of covid. Probably not something we needed to worry about, but it did cause the few remaining businesses and market stalls to obtain card readers. It's really not difficult, I used to run an annual conference on relationships and we had a couple of card readers for selling tickets in the run up to the event and selling books on the day. Outlay was minimal and processing fees were too. Definitely made up for the hassle of needing change. The only time I use cash now is my barber, who i visit 2/3 times a year and doesn't take cards....and I sometimes slip a fiver to a local homeless man.
Regarding photography, I find the most inconvenient thing about my phone camera is the lag between pressing the "shutter" button and something actually happening. But when it does, it's a decent digital camera. And for the majority of people it performs the function once provided by the box camera, Brownie, Instamatic, 110 pocket or Sure Shot.
Sure, many of the folk on this forum don't like using phone cameras. And I can certainly say that sometimes I get out a film camera for casual snapshots. But the public at large are not us....we are the outliers.
That said, there's definitely a large upwards swing in the interest in shooting film. No, there won't be a mini-lab on every street corner offering D&P for pennies. No, there won't be 3200ISO colour film again. No, there won't be film in the dollarpound store costing one dollarpound. Nobody is saying there will. But we might get a handful more discontinued products back, and a handful of interesting new ones....prices and availability will at least stabilise and some more retailers will resume stocking film.