My main imageboards over the years were 4chan, 7chan, KC, and 8chan.
7chan died and now only like 5 people post there, moot utterly wrecked 4chan before selling out to faggots, and 8chan killed itself during the 2016 US election by openly inviting redditors into their ranks. KC was autistic as shit and the mods were probably some of the worst I have ever seen.
It was all worth it though, the good times were very fun and I will always have those memories. I also learned a few things that nobody IRL would ever bother talking about with me, so it wasn't entirely useless either.
Nowadays I just sort of float around dozens of smaller imageboards.
Like many things, i've begun to hate them.