I joined lemmy.ml because the join-lemmy site gave me extremely little to go on. It was a coin toss between this and beehaw.org once I realized how few instances were established and not right-wing.
That was only 2 weeks ago and already I've seen the site force 2 server upgrades, even as the admins have strongly encouraged new users to join elsewhere to prevent centralization.
The instance list desperately needs a few columns added, including whether new signups are encouraged or discouraged.
The very minor and surmountable technical barrier of joining the fediverse will do wonders to screen out users capable only of the lowest effort.