I’ve started using Lemmy, but I’m still mainly on Reddit. I like the open source, open platform, and federated aspects of Lemmy. There’s also the greenfield aspect, because most of the best community names are unclaimed. At the same time, Reddit has a lot of niche interest subreddits that I’ve joined over the past 11 years of me being on there, including a medium sized subreddit that I moderate. I’m not giving that up.