I don’t have time to respond everything, but just about the growth part: Before the Reddit blackout happened, Lemmy was stuck with around 1000 monthly users for at least a year. It was quite boring compared to now, in 15 or 30 minutes you could read all new posts and comments for a day. It was also easy to recognize the handful of regular posters (cheers). At that time you could easily think the same, that Lemmy will never grow and people will leave. But then the Reddit migration happened and we got completely overwhelmed with a 70x increase in active users.

It seems to me that growth on the internet always happens with short spurts and long quiet periods. There will probably be a time when people come to Lemmy again and we reach hundreds of thousands or millions of active users. Then we will fondly remember the time when it was so small.