I think because everyone has their own corners, the common spaces don't need to be as toxic. Also, Lemmy's population is self selected because of the still high bar to entry. Lemmy basically feels like early Reddit. The hostile influence of moderators and the backlash anger everyone feels from being mistreated by them into silence is not yet here.

Not to pat ourselves on the back too much but right now it’s mainly the Reddit power users that are here. The normies are wondering why interesting as fuck was flooded with porn as of last night.

Because it's run by the people for the people! :)

I think there's many contributing factors. I actually was thinking about the same thing before I found your post, and the answer that came to mind outside of some of the ones people posted here was:

It feels like a breath of fresh air because we're outside the Walled Garden. We're not trapped on a platform who's soul has been crushed and wrung for every penny's worth like Reddit or Twitter. And we can see that there is a world on the Internet besides the Walled Garden and that fact is very liberating. It makes you feel like you don't have to go back.

Lemmy "feels refreshing" because it is new to you. This deliveres a dopamine hit to your brain because we inherently find new things exciting.

As a concept it is the same public forum we have had for a long time. But it is decentralised which does help with restricting the ability of single groups of people from taking control of the native, so that is a good side-effrct.

Fediverse denizens are really active.

I have been a user on Mastodon for quite some time but wasn't that active and felt it lacked some content for me. Now that I joined lemmy I learned that mastodon is federated and I learned about kbin! That's what makes it refreshing for me. A lot of new stuff and small communities emerging :)

I've had more traction on my posts and comments in the month or so I've been on lemmy than the entire 14 years I was on reddit. I'm glad I've moved, couldn't give two shits how it does from here out, I'm away.

On reddit, half of the users are bots controlled by various corporations and state departments.

This is absolutely true, and this is how the internet was back in the old days before Big tech and megaplatforms. People would set up little servers on their cable modems using spare laptops. It was experimental, it was imperfect, but it was ours. One side effect of this, was that you had to be at least a little bit smart to get yourself connected to it. Even if that just meant knowing that connecting to it was something that you wanted to do. That weeded out a lot of idiots who contribute low quality discussion. Also, because there is no giant company with a financial incentive to get everybody to use it as much as possible, things were built for raw functionality rather than trying to make them easy for people to get addicted to in 30 seconds. That naturally makes them more usable for anybody with an IQ over 90.

Also, no advertisements. No sponsored posts.

A lot of us have been nofapping reddit for a while so it's it a bit of a release to interact in this familiar way.

I think it all boils down to an older and more geeky user base.