AFAIK similar thing happens with Sony smartphones. They claim to officially support AOSP. But:
"If you unlock the bootloader, you may void the warranty of your device and/or any warranty from your operator. See your device’s warranty statement for details. Additionally, due to the modified device software, Sony’s repair network will likely have to replace key components before it can properly test, repair and verify your device using our repair tools and software. Consequently, if Sony performs a warranty repair, Sony will likely charge you a significant service fee for the additional costs caused by your modification of the software."
And regarding camera:
"Certain pre-loaded content on your device may also be inaccessible due to the removal of DRM security keys. For devices running recent software versions, for instance Xperia Z3, the removal of DRM security keys may affect advanced camera functionality. For example, noise reduction algorithms might be removed, and performance when taking photos in low-light conditions might be affected. The secure user data partition may also become inaccessible, and you will not be able to get any more official software upgrades if you unlock the bootloader."
I was very enthusiastic about Sony smartphones when I first read about them officially supporting AOSP, but after reading those terms I just bought cheap Android One Xiaomi instead, who supports unlocking bootloader with a single click, does not void your warranty or break your camera and you can easily re-flash original firmware.
"If you unlock the bootloader, you may void the warranty of your device and/or any warranty from your operator. See your device’s warranty statement for details. Additionally, due to the modified device software, Sony’s repair network will likely have to replace key components before it can properly test, repair and verify your device using our repair tools and software. Consequently, if Sony performs a warranty repair, Sony will likely charge you a significant service fee for the additional costs caused by your modification of the software."
And regarding camera:
"Certain pre-loaded content on your device may also be inaccessible due to the removal of DRM security keys. For devices running recent software versions, for instance Xperia Z3, the removal of DRM security keys may affect advanced camera functionality. For example, noise reduction algorithms might be removed, and performance when taking photos in low-light conditions might be affected. The secure user data partition may also become inaccessible, and you will not be able to get any more official software upgrades if you unlock the bootloader."
I was very enthusiastic about Sony smartphones when I first read about them officially supporting AOSP, but after reading those terms I just bought cheap Android One Xiaomi instead, who supports unlocking bootloader with a single click, does not void your warranty or break your camera and you can easily re-flash original firmware.