it can only be used with a pixel because it’s the only device that will allow you to install a custom os and relock the bootloader. Here’s the thing though, a thief could steal your device, unlock it again, which wipes everything, and now your device is theirs.

This is possible because the ORM unlock toggle is still turned on. Now, you could turn it off, but if graphene screws up an update, you’re pretty much screwed and can’t even return to stock because you can’t turn that switch back on without the device being bootable. 

It’s a catch 22. Turn it off and you risk ending up with a brick or keep it on and risk someone coming along and showing you how unsecured your device really is. 

 *OEM