Perhaps one day...
A few things contributed to its demise: less industry money sloshing around for travel and sponsorships, a growing sense that "Linux" didn't represent the entire community, and a pandemic.
Which left "Everything Open" launching weaker in every sense.
But I don't think Linux or Open Source feel sufficiently radical or inspiring to sustain that kind of community-building (local or global) these days... maybe a "Fuck AI" tech conference. :-D