One of the two big US planetary science conferences, LPSC, has been under fire in recent years that it really should move on from the suburban Houston conference center they have used for two decades. Last year, attendance was down considerably, as people decided to use their limited travel funds somewhere else.
And then today, after getting proposals for 23 other locations, they announced that they aren't going to change the location for 2027. So attendance will continue to decline, and the conference will continue its slip into obscurity.