feditips@social.growyourown.services correct, it mutes just that branch, because Mastodon doesn't understand that the entire reply tree is something that can exist.
When you mute a topic on NodeBB you mute it for good
@j12t@j12t.social pixelfed is broadly compatible with Mastodon, no? Unless of course the pixelfed account uploads more than 4 photos...
I'd say support for threadiverse platforms is mediocre at best.
@mastodonmigration@mastodon.online while this is a known workaround, I don't think it's a tenable long-term solution.
You can have "real decentralization" without the quirks, too.