Number of (active) Lemmy users seems to stabilize and I think this is a great thing. Indeed we got a lot of users when reddit shutdown its API (I was among them despite being a long time oss user), many have left, but the community seems now to stabilize to ~ ½ of the big grow in june '23. I think this is very nice for lemmy, we can be proud of this project.
The stats come from: https://fedidb.org/software/lemmy
One nice part of this is that the current level means that the next big event causing a wave away from Reddit will hold onto more people, since there's content here for them to see and read. When the last big batch came over 6 months ago, it was pretty bare and a lot of people left immediately.