Maybe this is unpopular but I'm getting tired of opening lemmy and having to scroll past the same post that I have viewed already, half of the posts on the front page are 2 or 3 days old.
I am a bit split.
I too find it a bit annoying to scroll past 80% of the posts.
On the other hand, sometimes I see that there are new comments (which lemmy shows) under a post about an interesting topic.
I think the UI, instead of just bringing the posts up without explanation, should show you how many new comments the post received.
It would be great for keeping tabs on a discussion, too.
The Reddit Enhancement Suite stores a cookie that remembers the number of comments when you visited a post. It's a killer feature.