Um, apparently, yes?
Google searches were doing "+reddit" before reddit melted down. The content was super discoverable and searchable. Everything (including discord, slack, and the fediverse) is laughably bad on that front.
People switched from twitter and reddit to ... discord and slack. Mostly beause they handle identity and phone apps--apparently searchability and discoverability isn't that important. I'm one of the olds, so don't get why the fuck people want phone apps to pester them all the time, but apparently the youngs want this very, very badly.
So, yeah, apparently twitter and reddit were really quite usable for the vast majority of users.
I'm a big fan of the fact that reddit's meltdown caused a bunch of people to set up forums again. However, that's a lot of duplicated work for every single forum administrator.