GrapheneOS is weird. It's advertised as "privacy- and security-focused" but in reality it's a great OS for everyone, it's like a pure version of Android without being too tied to Apple or Google. You can use the Play Store if you have an account, or Aurora if you don't want one, and F-Droid is there for the weird stuff.
And what made me switch, it has fucking Android Auto to listen to the music in my car. It's a bit tied to Google but it's a huge bonus for me. And for work applications, the Google account is still available but sandboxed.
Google prompts me to add a payment method EVERY TIME i try to install any app (including free apps, which are the only ones i install tbh), fucking hate it.
I tried to get something on iPhone once, added credit to my account using one of those vouchers you can get from the store. I was able to add the credit, but it refused to allow me to purchase anything without adding payment details.