As much as I’d love to think otherwise, i think a significant amount of the good feeling and comradery that we’re seeing now is due to us being in a bit of a honeymoon phase. You saw the same thing on Mastadon after the Twitter migration, everyone was singing kumbaya and holding hands, but overtime it started to regress a bit (though not nearly as much) towards a more “twitter” feel.
I’m sure over time it’ll stop being quite so feel-good and happy, but the fact that it’s community run and less centralized will help a lot in the long run i think. A lot of the friction and tension on Reddit was due in one way or another to it’s centralization - if you had a popular subreddit that was run by shitty mods, there wasn’t much you could do about it. here, you can just create a new version of the same sub on a different instance, and it’s a lot easier for people to “move” over to the new one.
I think the lower population helps a lot as well, right now the majority of the people on Lemmy are good faith users who care about the platform and want it to succeed. When you have 100’s of millions of users like Reddit does, you’re going to get a lot more bad faith users and people who just want generic content to scroll on