kbin seems like a great idea but the execution is meh. There are so many unnecessary things going on but simple things like collapsible comments and bookmarks are missing. You have to go to a post to view the links being posted. The interface also leaves a 2000s forum design vibes, with the random threads, users, communities in the sidebar. That's just wasting resources. Microblogs are included from mastodon, but if you want to microblog from with, they become threads.
Lemmy has come a long way, however kbin doesn't seem like it's changing all that much. I know it's still in beta, so I keep an eye out. Hopefully, it'll be more customizable in the future.