@russss If only there was a conference for conference organizers; we could call it #confconf! ;)
But in all seriousness, more conferences are starting to steal our #FOSDEM devroom concept and it's working really well for them; e.g. #IndiaFOSS did so quite successfully last year. Never been at #emf #emfcamp so I don't know the programme and space availability, of course.
@RichiH we ended up writing our own stuff just before Pretix and Pretalx came onto the scene, and it's all so tightly integrated and customised that it's now more work to switch, so we're kind of stuck with it all.
@RichiH to my knowledge, our constraint-solving scheduler is still unique and has saved us weeks of manual scheduling so far. (At the cost of perhaps days of debugging...)