excuse the pun but it's not practical to support some devices if the manufacturer keeps placing road blocks. THeya re simply not worth the effort when there are so many great options that make it easy to unlock and flash. Some even give you unbrick tools in case you kill the bootloader.

If you want a devices that can be easily customized, just buy one of the ones that have the OEM unlock option in the dev menu. For power users, those are the only ones worth buying and supporting.

Vote with your wallet.