I think the big problem is the concept of state and corresponding geographical boundaries. If humanity could get rid of geographical binding of territories to states, it would stop all wars, and capitalism would work much better for everyone. Instead of states there could be some kind of unions and they could be represented in different geographical locations, and the infrastructure of any geographical location could be managed by cooperation of unions existing there.

Doomworld for new maps and mapsets for Doom 2 and Heretic.

I believe old style means linear threads and other oldschool UI choices, not just look/aesthetics. That one has tree comment structure similar to all redditlikes, which (I believe) is relatively a recent invention? Have you seen comment trees like this few decades ago?

I just checked this again, first for game I had there for free but bought later on Steam - City of Brass - and couldn't find achievements anywhere. I then looked into Fortnite and League of Legends - also no achievements. I then found there is "my achievements" link somewhere in my profile, from where I could click "browse games with achievements" and turns out, from few dozens games I own there not a single one has achievements.

I like how many games they give away for free, but tbh I've never played any of them there. Some of those games I decided to buy later on Steam anyway just to do achievements (epic launcher doesn't have achievements, cards, any meaningful statistics, etc).

The only tree structured texting thing from back then that I remember is mailing list conversations. If you remember any names of old forums like that, it would be interesting to research. Maybe there are still screenshots or archived pages of those.

I personally think this is more of a culture thing than anything related to UI. So yes, moderation is very important to that, features/design/UI/UX to lesser extent. Memes on Reddit are mostly posted to subreddits dedicated to memes, you can actually just not subscribe to those. You can also use "home" feed instead of "popular", "explore", "all" so that you don't get random irrelevant meme subreddits tossed into your feed. Personally, my biggest problem with Reddit is non-transparent moderation. And sometimes even automoderation. Things just get removed automatically for mysterious reasons, then you go ask why. Then question also gets removed silently without any explanations. That's how Reddit moderation is nowadays. Lemmyworld also has some moderation issues and drama going on, but the whole platform is inherently decentralized and you're free to pick any other instance with different admins and moderation choices. I already started using few more to see how it goes and to ultimately stick with what I like best.

Do they lose their karma after deleting the post?

I've also had similar problem, but the trick is if you ask it for clarifications without it sounding like you imply them wrong, they might actually try to explain the reasoning without trying to change the answer.