Selenium toning of negatives is even in the long tail of film photography, but I'd still call it on-topic in the sense that Karel mentions. I'd add that such questions are pretty easy to avoid using 'ignored' tags (like I ignore 'hdr').
In the vast majority of situations, there is no appreciable distinction between digital and film photography - it's just photography. Many people shoot film and digital, and lots of digital users may get interested in film for any number of reasons.
That said, I know a lot of film users wouldn't bother with a community that was a priori hostile to film content (and I've said so elsewhere on here). It would be silly to put up such a barrier to their participation.