[faho]

>Matrix's moderation should be at least as good as Gitter

Well, yes and no. The moderation features might be the same, but:

1. It's a lot easier to make matrix accounts, especially if you run your own server.

2. The user interface for blocking an entire server is basically missing? The only thing I can find has you run a bot to do it?

So if someone with their own homeserver wants to troll you, you end up playing wack-a-mole unless you self-host a bot. At least that's the best I can find so far.