The mission-driven tech company behind the Firefox browser, Pocket reader and other apps is now investing its energy into the so-called “fediverse” — a collection of decentralized social networking applications, like Mastodon, that communicate with one another over the ActivityPub protocol.
I agree with your preference for forum/community style.
But I think the purpose of microblogging is to follow a personality, rather than a topic or community. And users that share there do so to cultivate a following, which would be harder on Reddit/Lemmy (only ones that I can think of who do that successfully are onlyfans users).