It's become harder to get clean(ish) audio captures for theater films, but it's not impossible. There are still theaters with hearing impaired seating and headphone hookups, still a few drive-in theaters that broadcast via FM (one of those here in Reno, actually).

If anything, I think it's because digital rips/DLs seem to come out more quickly. By the time a group has tracked down a clean audio stream and takes the time to sync it with footage, someone's probably snagged a digital copy and released it.

Now Telecines, those are basically unseen these days. Almost no theaters still use actual film, and the few that do are way more careful about their inventory management. Gone are the days when a whole film can just get "misplaced" for a few days while someone with a Telecine setup copies it, to say nothing of how few people have the setup for Telecine anymore in the first place.