I think LGTVs are the best in regards to this because they base their OS on an opensource linux distro called webOS, and at any point you could flash those TVs with the non proprietary open source version. This also means your remote will continue to work as well.

Also the TV never auto-updates, it always asks to update.

I think LGTVs are the best in regards to this because they base their OS on an opensource linux distro called webOS, and at any point you could flash those TVs with the non proprietary open source version. This also means your remote will continue to work as well.