If you plan to slap a custom ROM of some sort on your phone, you’ll need a custom recovery. TWRP is the go-to recovery for a ton of devices, but sometimes you have to wait for official support. Not so with the new Nexus. The Nexus 5X just started shipping earlier this week, but already there’s official TWRP support for the device.
TWRP lets you flash whatever you want to the device (bootloader unlocked, of course), make backups, and more.
TWRP Is Available For The Nexus 5X, But Decrypting Data Isn’t Supported Yet was written by the awesome team at Android Police.