For me, the content created by communities that is exclusively available on that site is really helpful to me. If possible I would definitely try and archive a few subreddits and write something to search and access it offline (sorta like https://en.wikipedia.org/wiki/Kiwix but for reddit).
I’m not here because I don’t want Reddit, I’m here because I do want Reddit, but it looks like the Reddit Corp is going to break it.
I don’t think I’ll leave Reddit until it goes to shit, but if mods leave, communities will fall apart and I won’t have any reason to be there any more. We’ll see what it looks like tomorrow.
Lemmy seems like the most likely to rise up and take Reddit’s place, so here I am. My only major complaint is the lack of user base, so I’ll stick around for a while and contribute my +1 in the hopes that enough others do the same thing to get the critical mass needed for niche hobby groups to form.