Then communities are only discoverable if someone already linked to it on your instance.

That’s a good point. The community search could really be improved. And it’s also a bit of a problem that currently the number of subscribers for a community that you see is only the number of subscribers from your home instance.

What are the “complexities” people are talking about when they say that lemmy won’t catch on? Yes there were some stability issues and bugs in the last couple of days but that’s just a bit of growing pains. I don’t see how lemmy is harder to use than reddit. Like you google “lemmy”, first link is https://join-lemmy.org/, you click Join a Server and then you see “You can access all content in the lemmyverse from any server/instance.” so then you just pick one of the instances and create an account.