[wrxtasy]

Amlogic already implemented the pass-through changes in their source code but manufacturers are too lazy to get it and would rather release new devices to get payment a second time from customers.

Bit of a correction here, there are numerous Bug fixes for AML Android devices in the currently available AML Nougat 7.x codebase.
But dirt cheap S9xx sellers are either completely clueless, lack the skills or don't give a fuck about patching current AML Marshmallow 6.x Firmware on already purchased devices.

There is no money to be made in doing that sort of thing. As already stated, cheap Android Sellers would rather spend their time selling you a new buggy Android device.
It is all about moving Boxes out the door as quick as possible. Not fixing Firmware to use standard Android API's and be Krypton compatible.

This is dirt cheap Android media player marketing 101 - and its been going on for quite a while now.