Think of lemmy as like an email (except everyone can see it). You have an email address “steakfries” and the domain you registered your email on “@lemmy.one” so if I want to email you I have to enter in @steakfries@lemmy.one

I can “email” you from any domain, be it Gmail, yahoo, my own server, etc and you can likewise respond.

Going to download my data tomorrow and delete my own 11 years worth.

Sad day, but also very cathartic.