This was a feature that I fell in love with on Boost. I like to sort by top day and do short quick bursts of scrolling through the feed, so it helped a lot.
I’m not even sure if it’s possible on lemmy, or if anyone else feels they’d get use from it as well.
That would really be useful, if I scrolled past a post the first time, I will also scroll past it every other time, I don’t need to see it again.