Sure, but it's definitely not the return of forums and the fact it is being used in place of forums will cause trouble down the line.

It's not really a good thing for technical discussion and support topics though. Information that others might hope to find by searching the web is no longer discoverable that way.

They are forgotten for all useful intents and purposes, but a malicious asshole can and will memorialize everything you say on it.

Yes for social outlets. For niche hobbies? old photos of specific milling machines used in machine shops on board US navy vessels? For 80's european automotive restoration? For repairing and restoring retro-computing devices? Terrible. Terrible Terrible Terrible.