I installed Ignited via SideStore. No Jailbreaking necessary. Not computer tether. SideStore can renew the side loaded emulator every 7 days when on WiFi. The iPhone is perfect for DS emulation with a stylus.
(Ignited is a fork of Delta with more options, and SideStore is a fork of AltStore, with no computer tether needed)
iMessage is how so many people communicate around me. It's a lot more than just blue bubbles. It's games, SharePlay, AirDrop (this is a huge one), and much more. Countless times, I've wanted to play some kind of iMessage game with a group of other people, but I have an Android so I can't.
Okay the 2nd point is pretty moot actually. The only thing I can think of is Snapchat dark mode but that's one feature on a proprietary social platform countless open source apps.
I really wish I could run away from the megacorps, but they dominate the market so I can't. And these days I hate Google much more than Apple.