Hacker News Reader

There are multiple alternatives, but very few user seem to want to switch

I think a moderated mirror of certain subs would be a better solution. Because people like freedom but love their cats and memes much more.

That wiki page is a little outdated. The pinned thread is a little more recent but still missing a lot of offshoots like TheMotte.org.

Ironically the only off-site that ever really took off is the snuff film site which has 2.3M users now.