The linked article summarizes the problems in the paragraph starting "I've been aware of Lemmy for a long time". For an alternative view: the Fedi.Tips account on Mastodon – typically a cheerleader for all apps of the FediVerse – shared some more pointed words about them in this thread and reiterated the warning just yesterday after noticing the Lemmy team's successful recruitment campaign on Reddit.

I was one of the people they recruited, and ran into problems myself only after signing up at lemmy.ml and being surprised by the amount of CCP propaganda posted there. At first I thought it was strange that I was being downvoted for pointing it out, and that the devs (also admins of that instance) ignored/downvoted me when I flagged the issue for their attention. After researching a bit, I found that Lemmy's basically developed and maintained by two people, both of whom seem to be westerners fetishizing Mao Zedong Thought – literally to the point of writing lengthy apologetics for the CCP's human rights abuses including the Uyghur genocide.

They're clearly skilled engineers, but I can't trust or support them, and relying on instance of Lemmy means I'd have to do both.