Yeah, if I were LW, I would stop allowing new users. I feel like servers should be either user or community based, not both. One for users has nice things like alternate skins (e.g. a.lemmy.world or old.lemmy.world) and ones for communities are focused primarily on having good moderators and being super reliable so that federations to them work 100% of the time.
Yeah, but they have to be installed by the server admins. lemmy.world added them. I’m not aware of any other instances that have them, but I’d love for them to be standard. The a.lemmy.world is my favorite lemmy experience so far (though I can’t…ummm…use it right now).