The rush for RF and other classic film cameras has to do with boredom. If these people were really serious about film, most AF SLRs wouldn't be selling dirt cheap. I mean you can buy a Yashica GSN and a Nikon N80 for the same price! That tells me its not about film or photography, its just another cool trend.
Is there, in fact, a "rush" for RF and other film cameras? I'm not sure I see the evidence.
I don't know about others, but when I returned to photography a few years ago I initially tried a DSLR. Didn't enjoy using it. Although the images were not bad, the process of getting them was pretty insipid. In addition, while the camera body was small-ish, the lenses were not.
So I decided I didn't want what the DSLR's were offering. I didn't want "landscape" or "portrait" mode. I wanted "my" mode. I.e., I wanted to control how the image looked. I didn't want a program burned into a chip that had been devised to satisfy most people most of the time to make that call for me. (Yes, manual mode was offered, but was a Rube Goldbergian affair that required standing on my head and having three thumbs.)
I felt I was learning how to use a DSLR, not learning how to do photography. I felt removed from the process of photography, as removed as the guy setting up an Excel spreadsheet is removed from the coding that created Excel.
RF's met my requirements. They are small, with smaller lenses. They are designed to be used manually. They are, in fact, easy to use. The fact that all but a few use film was incidental and not a reason for my choice. It was more along the lines of "You want an RF? You get film with that."
A crucial factor for me was the desire to control the results, i.e., to be on the hook for exposure and composition. I don't find determining exposure to be an arduous task, but it often provides an interesting and appealing challenge. It's part of the process that, for me, makes it worth my while. Examining the results of each effort is a new chance to learn more about photography, which is what I'm after.
An analogy might be to cooking. Cooking produces food we eat. Most of us, when we want a nice meal, just go out to a restaurant. The meal is delivered to our table, a bit like a DSLR delivers an image. Some of us, though, enjoy the process of cooking. The delivery of a successful meal tells us we got the process right. So, we keep sweating it out in hot, cramped kitchens, doing things the hard way.