At least on the communities i follow. Every so often I come across a thread where i recognize most of the users there even in the big communities with over 30k members and I haven’t even been on lemmy that long.
What helps me is having the perspective that people change from moment to moment, and we don’t see enough moments in a row to pick out a pattern generally. Even if I see the same names, it helps to treat them with new eyes everytime. Also makes it easier to catch someone on a bad day but then have a nice conversation the next.