>>1074576164chan has been slowly hemorrhaging dedicated users for a few years now.
That era of this place being a centrifugal location of online social interaction is long over, and is sharing a cross-pollinated userbase from other platforms.
pic related is /a/ slowing down to 2009 levels of activity, and anecdotally, you can probably see more outside influences here (most probably from the /qa/ altchan and xitter) more often with the users who do use 4chan in 2025.