I doubt that the people who say film is no longer available have any interest in buying it. If they did have any interest, it is too easy these days to find out that it is available.
That is my whole point. I regularly see people who observe me out and about, and who are surprised that I can still get film for anything from a 20s box camera to a 90s 35mm SLR. When in my home town I explain that the camera shop on the edge of the town centre sells everything they could possibly want, and Boots in the mall still sell 120 and 135 film. Elsewhere I just point out that film for almost any camera is still available online and they're quite gobsmacked...."I'll get my old CaNikon out of the drawer, then, I had no idea it was still available" is quite a common response. My local camera shop reports a lot of people doing just that, getting old cameras out of the loft/cupboard...dusting them off...buying a film or three and getting back to shooting.
My mum's new "boyfriend" (he's 80 years old, she's 75) was quite amazed that I'd actually been shooting film in a box camera in 2018 and gave me four film cameras that his brother had been thinking of simply throwing out. I personally know three people who hadn't shot film in 15 years and hanging out with me has got them back into it. I've been quite a bad influence....one has gone and bought no fewer than 4 film cameras and been given another....another has bought 6 film cameras, the equipment to develop her own B&W film at home and has decided that one shelf of the family fridge is now the "film shelf". None of these people would even be shooting any film if they hadn't *talked* about how it's still relatively easy to buy.
Sometimes interest has to be sparked. If one thinks a product has gone, the interest wanes. My dad gave up on his plate camera because he thought quarter plates became unavailable in the 1960s...yet they remain available to this very day (Thank you mr. Lane - and other options exist) but he just hadn't seen them in camera shops and inquiries at said shops lead to him being told "nah, use film instead". Had he known, he'd have been buying glass plates or sheet film in the 80s and 90s. As it is, I am now doing just that because I found out they are available (again thanks Mr. Lane!)