Do you know anyone in real life that uses Lemmy?

Nah. My brother, wife, my two best friends and one co-worker are the only ones who even know it exists, and that's because they know I use it as an alternative to reddit since the API fiasco. It's honestly pretty obscure, but I like it that way. I'd love to see larger niche communities, especially since r/stalker was one of the only places I could actively talk about my favorite game series, but Lemmy has been a far better experience overall.