I think that user donations are easier when an instance has a good focus. There are some other instances I can think of where the donation model has been enough to cover things. In addition to feddit.dk and beehaw, an instance I use most of the time, ani.social, is more than covered by donations last I checked. It looks like @hitagi@ani.social even took away the donate link in the sidebar. Never mind, I am just blind. I didn’t notice the little Ko-fi badge at the bottom. I was looking for a text link.

Yeah, spoiler tags are the one big feature that is missing. There are also some minor things on the moderation side that aren’t there. For example, admin accounts don’t have a full list of options in the moderation menu.