Comment by accrual

Agree. I used tweaked BlackBerry ROMs for a couple years before getting my first Android device, an HTC One M7 with Android 4.4 KitKat. Spent loads of time getting all the tools working to modify ROMs, bootloaders, recovery/TWRP, and squeeze every drop of performance out of that phone. Then went "backwards" to an iPhone 4S and have been rocking stock iPhones ever since.