Originally Posted by redhonker
If I update, is there a way to downgrade later?
No. Not exactly. Due to changes in the bootloader included with 4.4.2, under certain circumstances when trying to downgrade from 4.4.2 to 4.4 or lower, you could either brick your phone, or set it up to brick in the future when you take an upgrade. So it is suggested you just stick with what is on your phone once you get on 4.4.2.
It certainly caused enough issues that those with locked bootloaders were told to NOT try and downgrade from 4.4.2 in order to attempt to obtain root via SlapMyMoto/MotoWpNoMo processes.
There was a thread fully discussing bricking the X when downgrading from 4.4.2 to older firmwares here on XDA but for some reason that has since disappeared. There is still this thread -> http://forums.androidcentral.com/mot...ur-system.html
which discusses it.