When I started, I picked Beehaw on lemmy. I hated the autorefresh and some other settings (around language IIRC, but it’s been a while) not saving and/or not working. I went to kbin as a result. I know lemmy no longer autorefreshes in newer versions, but I just got used to the layout and feel of mbin.
People didn’t find what they wanted and/or went back to what was stable and familiar. I still am avoiding using reddit for anything except the subs related to people living in Japan (the community didn’t move over; a couple did but there were basically no posts very quickly) and when it shows up in some search result and nothing else has worked.