Jerboa was unstable to the point of unusability when I first started using Lemmy but I'm checking it out again now and it seems to work at least. Not quite Boost though.
I've been using WefWef to tide me over but it's not what I'm looking for and it's missing a lot of stuff still.
EDIT: Jerboa is still extremely unstable and in addition to crashing it suddenly thought I was not logged in while refusing to let me log in. It's the most Boost like interface but for now I'm sticking to WefWef and also trying Liftoff.
The worry about EEE is actually not my primary concern at the moment. And it's not data collection either, though I hate what Meta is doing there.
I'm not interested in Threads "content" on my front page here. And boy will it ever be all over the "All" page thanks to Threads users outnumbering all of the Fediverse by many magnitudes. The poor algorithm is not going to show you any new Lemmy content anymore with all the engagement Threads posts is going to get.
Then there are the comments in communities here. If you've felt happy that this community has better atmosphere and discussions than the dreg you'd be served on Reddit, just wait until we open the door for hundreds of millions of Facebook commenters.
I love the community that is building on Lemmy. If I wanted to participate in the community on Meta I'd be on Instagram or Facebook or Threads.
But I don't. That's why I'm here.