There's nothing wrong with using Reddit, Twitter, and other mainstream site still while being active on fediverse.

I see a lot of posts on fediverse trashing reddit, Twitter, spez, musk and so on, and rightfully so. But like it or not, the mass majority of users on the internet still use these sites, and some of us still want to interact with the friends and communities we are a part of on those sites. And there's nothing wrong with that...