MuteXR

You can also take a look at Calckey, which is a Misskey fork and instead of Ai-Chan has a bird with a weed problem as mascot.

This is a feature. This is an open source project, nobody cares about the sales pitch to some old executives.

How would a DHT be any better than AP? It's not even close to doing the same thing, very few people would want something that comes with all the massive disadvantages that a DHT would bring.

Mastodon isn't designed for massive instances, people are supposed to find smaller ones instead of centralizing. If you "scale", it goes against what Mastodon is even for.