How are so many sites OK with using cloudflare when they are basically a MITM?
Because it's everyones MITM. I trust them with security because it's the only thing they focus on, I focus on making my stuff stop randomly shutting down. If absolutely everyone is using it, I don't care too much if an issue appears- nobody cares about my tiny little thing when Discord goes through Cloudflare
1
What can you do with your own domain name in regards to self hosting?
Still a bit wrong. You can use things like Portzilla and make it so that certain subdomains are for certain game servers.
1
Anything interesting I could do with spare Android phones?
Home assistant + fully kiosk browser
(Or root + termux + docker)
1