I think this is a strong reminder: We shouldn't put all our eggs in one basket. This will happen again. Unlike Reddit, we don't need to concentrate all communities on one instance. We should all make an effort to spread out. Some other general use instances are:
Again, for those new, you can post content to any of these instances and interact with content from other instances at the same time, just like you can send an email from your Gmail account to your ProtonMail account.
Lemmy is the closest thing yet for sure.
The main pros: decentralized*, productive conversations, no karma, open source.
The main con is that "decentralized" is a good idea, but it only works if practiced. Most people have jumped onto lemmy.world instead of spreading out. Minor cons include a lack of decent video embedding, missing some niche communities, and small bugs.
Overall I've rediscovered a lot of the internet that I had simply stopped checking because reddit took over my digital life. I read HackerNews again, the NYT, and a lot more. It's nice.