The Quest 1 bootloader has now been unlocked on the latest firmware!
The method uses a privilege-escalation chain to gain root, then replaces the stock ABL with an older vulnerable version, allowing the bootloader to be unlocked through a known fastboot vulnerability. The folk that are working on this exploit are currently cleaning everything up and plan to release the full method/tooling soon on this github repo. If you still have a Quest 1 lying around, it might finally be time to dig it back out! EDIT: It has released!
u/notmastergamerok — 10 hours ago