It's not a matter of "before Mastodon" and "after Mastodon", at all.
I was trying not to state this so bluntly, but basically, platforms that came before Mastodon had blockquotes before Mastodon existed. We did not get rid of them in 2016, and we aren't getting rid of them now.
So, even if you implement this proposed feature, which is your right, some platforms will stay with the tried and true blockquotes.
@julian It's interesting how different platforms implement things. Some platforms, like Friendica, tell you which platform someone is using by showing a little icon next to their name on all of their posts (Mastodon icon, Hubzilla icon, potentially a NodeBB icon, etc.), whereas Mastodon makes it appear as if everyone is on Mastodon. Some Mastodon users are not even aware that they are talking to people on other platforms.
The reason why I say indicating that it is a forum or group discussion is useful is not just the cultural issue, but also because replies to forum posts are distributed differently than a normal post. You are not just replying to your followers and the person who posted, but also to everyone following the forum (or forum category).
But, this is something that is nice to have, and not needed. It just is useful information to have. And I doubt that platforms like Mastodon will make such a change anyway.
It's also interesting to see how platforms that pre-date Mastodon implement things versus platforms that came later and are influenced by Mastodon.
One thing that would help is if users could tell if they were replying to a forum or not. Because the rules & culture regarding forums are different than the rules & culture on micro-blogging platforms. But most platforms do not indicate this to their users.
@jas0n All instances of Mastodon run the same source code, unless it is one of the many forks, like Hometown. But none of the other fediverse server software out there uses Mastodon code. They are completely different projects with completely different codebases. What they have in common is that they speak ActivityPub.
It's not just that they may not care. They may not know what they're being asked or know what the consequences are for choosing either option. Then they sit there for 30 minutes searching the internet for what the question means.