Hi from lemm.ee👋
Firefish user here. While I do agree with the statement, I’d like to add that Firefish integrated really well in “twitter-verse”. You can see post from Mastodon, Misskey, Akkoma/Pleroma and other platforms. So the small userbase isn’t much of a problem.
I, personally, find Misskey/Firefish a much better alternative to Twitter than mastodon. It has everything you’d expect: Nice and clean UI, “quoted retweets” ability, working search functionality, post reactions and much more.
However you still need to go to an accounts instance to see its subscriptions/subscribes. But I guess it will be fixed in future
Both Lemmy and Kbin users can see each other’s content. This is the beauty of Fediverse
I’m on calckey.world, and it seems to be federated with mastodon.art. at least post from there appear on my global feed