For me mastadon didn’t ‘stick’ but I was never a big twitter user. So I failed to jump from from the big social networks to mastadon because the experience was weird. I guess you can follow lemmy communties but I had no idea how to find them and it mostly looked like following other people like on twitter.
Whereas the UI and everything on lemmy is much more like what Im used to it (reddit) - so it ‘stuck’ for me.
I still have the mastadon account collecting dust and might go back over there now that I understand more, but as I prefer to follow subjects over people I dont feel like Im missing out