Yeah I've also been on Lemmy since before federation, just haven't been active because of the lack of engagement in general. I've considered getting an invite for tildes, I will probably check it out, but most of the other alts are mostly filled with the sort of racists that reddit has been banning the last few years, so Lemmy and tildes are I think the only viable options atm.
I like Lemmy more because personally I'm a fan of shitposting and memes and Lemmy seems to support that more. I hope that the popularity of Mastadon in relation to twitter will help redditors understand what Lemmy is, and they can look past the tankie stuff. There are already instances like beehaw that arent tankie but are pretty popular. I guess I just really hope we can move on from reddit but keep the community that made reddit feel special in the early days.