I'm in touch with most of the band members from late '90s / 2000s & still see them at weddings or for drinks on occasion. The drummer from those bands is ace, still drumming in a very good band that I've just sorted out tickets to see later this month - really looking forward to seeing him & his new band - the best drummer / musician I've been lucky enough to play with.
Conversely, the band that I was in up 'til recently, I have seen sometimes, but really not bothered either way - I certainly wouldn't go to see them gig if they ever get that far. I would be interested to see how their guitarist turned bass player is getting on - but only out of badness!