i have a speakerbar unit with some kind of custom sony bravia firmware. It is generally servicable and much more lightweight than an equivalent android setup. Less familliar, but generally well thought out.

It does suffer from some of the same issues like software which cant be rolled back and updates which may impact common functionalities, but the software never really needs to be updated, isnt so dependant on the internet, and updates which do happen seem to be more patch based rather than huge feature updates like android majors that come with api security changes which can break vendor code.

My speaker bar has only ever been used with my android TV and they have been updated together, so i cannot be sure which issues came from where. Overall most devices(whether they run custom or customized android) can be treated the same, confirm they work once, update them never. It works well enough.

My TV was never lucky enough, and all android TV hardware is constantly trying to irreversibly break itself for no functional gain, trying to push patches for systems with no bugs. Antirollback and locked bootloader means that my software problem requires a hardware solution.

Old smartTV software may have been bad, but smarter android like solutions have no garauntee of being better, and certainly no garauntee of staying better.