I've used Mastodon in the past, and currently Sharkey(a Misskey fork) is my microblogging platform of choice.

Mastodon: fast, polished, and has a huge choice of different apps for all platforms. But the main drawback is its lack of features. "Why can't I search for the posts" " or "Why there's no quote repost button?"

It was obvious to me that Mastodon can't do all the things I need. I was desperately thinking that I'll have to move back to Twitter, but at the last moment Calckey rebranded itself to Firefish, and it got my attention. "Finally, a great replacement for Twitter" I thought. But the terrible performance of firefish. social made my experience with fediverse just terrible (I also used Calckey.world, but I moved from it for no reason tbh).

I was once again searching for an alternative, and this time I found it.

Sharkey: has all the features of Misskey + added some from other forks (like Firefish's post editing). I picked a small instance with less than 10 people, and the performance is really great. My only nitpick is that you can't swipe between home/local/federated feeds like in Firefish, but that's a small issue.

I personally think Misskey (and its forks) should become the mainstream microblogging platforms on the fediverse, while Mastodon should retire.