World was already the biggest by far when I first started lurking back in July, and it’s just getting more dominant. Before, there was quite some diversity in the distribution of generic communities, but nowadays the vast majority of posts that reach the top are from over there.
I really can’t see any specific virtue that it has; uptime is not the best (or so I’ve heard), the moderation is quite lacking (which is demonstrated by the fact that Beehaw defederated them), they make some unpopular moderation choices (like blocking !piracy@lemmy.dbzer0.com), and overall the atmosphere is a lot less… nice than those of smaller instances.
I also feel like it goes against the idea of the Fediverse that one instance has control over most of the platform. Especially on Lemmy, where communities mean that building community within an instance makes so much more sense than elsewhere, and upvotes are federated near perfectly regardless the size of your instance, decentralisation makes a lot of sense. It really just doesn’t make sense to me that Lemmy World is where people are going.
I first joined lemmy.world during the exudus because it was the most recommended one. Soon after, dropped it and joined lemmy.zip. My reason was world’s uptime issue, going dark because of constant DDoS attacks (not their fault) and the last straw for me was the ban of piracy community. I love lemmy.zip, they don’t ban instances or communities unless it absolutely warrants in which case the mods reached out to members for vote. Another big reason I love zip is because the mods are very chill and don’t overstep. I haven’t had any technical issue with zip.
The DDoS attacks are totally their fault, as are the constant CSAM attacks, because those are the kinds of people they keep around. The only websites I’ve ever seen sustain multiple DDoS attacks are those run by admins who passively protect child abusers and nazis because they’re the kinds of thin-skinned crackers who will go nuclear on even the slightest of perceived inconvenience, or sometimes for no reason at all.