There's has been a mini resurgence in C from (normally high level language) programmers who are getting sick of web development and are interested in data oriented design.
Conference benefits could be:
Pushing the C standard. C11 is barely supported.
Discussing new standards in a forum other than mailing lists. Did you guys know there is already a C17 standard?
Letting old C devs pass on their wisdom to new C devs. C has a lot of pitfalls but also has a lot of neat tricks.
I've been a flux user for years, but sadly I had to switch to the Windows 10's version. Flux causes a 1 frame lag every 60 frames which was driving me crazy. Only fix was to put it into Safe Mode, but Flux is really janky in that mode; especially when alt tabbing. The Windows 10 version also has no lag while shift colors. It's a shame. I'd love to have kept supporting flux.