Sites like this has helped me greatly in checking out where my subscribed subreddits have gone to: https://sub.rehab/ I also find myself sometimes idly browsing All on the off chance that I'll discover some community I would like.

And yeah, there might be a lot of fence sitters, but I think after the wave that's coming after the end of this month, things will quiet down. From then on, it's really up to us already here if Lemmy/Kbin will be a thing, or it'd just be a fad. Network effect is a hell of a drug, but if there ends up a stable and engaged population here, creating and consuming content, it's already a win in my book.