Shitting on someone just for not liking systemd is really stupid. FOSS thrives on diversity, and having alternatives to systemd's parts will always be a plus. I'm okay with systemd myself, but it's easy to understand why some might not like it.
As much as I preemptively created an account on another server (as I prefer admins to have a decisive stance in regards to Meta and similar corporations), it'd be good to wait for lemmy.world admins official message on it before telling everyone to leave.
But if they do "officially" bend the knee, yeah, it's time to leave if you want to avoid Meta.
They're open as it seems (since I got to register today), but the sign-up process requires you to answer a few basic questions to verify you're not a bot or spam account.
I am on lemmy.world, but the inaction of the admins there made me create an account here on .ml as soon as I saw one of the admins being basically as "naive" as Mastodon's Rochko.
Some projects can be kind of interesting, most aren't though, and I can agree with the sentiment