Kind of like if there was a Lemmy Star Trek server and it hosted a bunch of communities with different topics that are all related to Star Trek?
The architecture is in place to do what you’re talking about. Just needs the right people to adopt the approach over time.
That’s just a function of how the host server sorts posts.
I am fairly sure that functionality could be implemented without the need to even fork the version.You can go to your user setting and select new comments and do this now.