I would wager most of nowadays instances have either fallen into obscurity or just finished existing, I think we will see instancea more focused in scalability if thr fediverse grows in popularity, whoch will kind of dominate the space.
If I had to guess for a few I would say beehaw and lemm.ee will also still be alive in some way or another, but I dont think they will keep being as big in proportion to other instances as they are now.
This ! Also, I'm kind of disappointed how many of my peers just waited for the #reddit#blackout to pass, so they can go back to buissness as usual. Supringsingly, to me, there are a lot of people who enjoy corponet just fine.
With open source and interoperability, this is a good thing, because then you can choose the experience you wanna have. You're not bound to a single vendor-locked platform that's subject to continuity issues or a degraded experience that forces you to move elsewhere and start over in terms of following/followers. You simply pack up and migrate to another instance.