Filtering by New seems to be the best way to view Lemmy.
Over the last few days, it seems that filtering by Hot or Active just makes me see the same posts I've seen over the last few days (stealing memes meme and $4k fridge).
Filtering by New on Lemmy, however, is not the toxic filth that Reddit is, and generally gets the job done.
Unless I am doing something wrong, Hot and Active seem to not update enough / hide what I've already seen. I am doing my Subscribed, about 20 subs.
This has been the same experience for me, Active/Hot shows posts from Monday because they're still gaining comments but New shows genuinely new posts. I think the algorithm may simply not be tuned for tens of thousands of users
More in-depth answer: Currently there’s no set date. It depends on how quickly they can tear out all the WebSockets code and replace it with simple HTTP (that’s the BIG change, will fix a lot of different things), and then test those changes. The hot_rank fix has already been merged, that’s done, but they want a stable, cohesive release with all the good stuff.
Current estimations I’ve seen range from 1-2 weeks, but it all depends on how fast they can get it coded and tested.