Hej there,
I’m having a Philips Android TV which seem not to get updates any longer. This results in some issues regarding some apps. Moreover the default apps eat up the storage. I wonder if there is an option to flash a kind of vanilla rom on a AndroidTV and if yes how this would be done.
Buy an external Android TV box, such as Mi-Box, Fire TV 4k Stick, Google Chromecast with Google TV, or an nVidia Shield.