Mastodon has been a better alternative to reddit for me than Lemmy has so far tbh, except it's not as interactive with other people I less you chase followers. But the niche communities have more activity over there than here so far.
Don't get me started on just how much of a clone Mastodon is, it's like they really wanted to be behind on features. Meanwhile there's other worthy platforms like Akkoma and Misskey that add some really nice features.