I might be one of the few that was already on their way out. I had been getting sick of Reddit It wasn't the same thing it was when I first joined in ~2011ish. Back then, content was more scrutinized and users were kinder. As Reddit became mainstream, the content slowly changed to reflect that. It started to be more like an anonymous Facebook. I remember it sticking out especially after the Game Stop incident on WallStreetBets.
A few months before the API fiasco, I was banned from a sub because they misunderstood a comment I made as violating their rules. Because I had been banned from another sub recently (I think I had joined a China one then commented in an anarchist one for the lulz), I was suspended from Reddit entirely for a week. I didn't realize that I was doing it, but I used several usernames depending on what content I wanted to focus on. I commented using another username and was permabanned from Reddit entirely for trying to bypass the temp suspension. The specifics might be slightly different since I'm going from memory.
From then on, I would lurk in my favorite subs sporadicall using Reddit is Fun. Once the API fiasco kicked off a few months later, there was a push for Reddit alternatives, which gave me the opportunity to find and join Lemmy. I've been here ever since.