I didn't know Hubzilla had been doing quote-posts for so long — very cool.
I know Misskey and its various forks have had quote-posts working for a while, too.
I think also Pleroma and Akkoma have, too.
Mastodon is the latest to add support for quote-posts, not the first. But, I am happy that Mastodon has it.
...
Mastodon's quote-posts seems Twitter-like, so I suppose that is as intended (if that is what you meant).