I've been lamenting the death of the dumb TV for years now, but I'm finally in the market for a new set and trying to plan my next purchase carefully.

I've come to grips with the fact that any late-model TV I buy is going to feature some or all of the following:

• Internet connectivity
• Slow, janky menu screens with awful UIs
• Pre-installed apps (all of which I consider bloatware)
• Ads incorporated into the built-in menus or overlaid on my content
• Alexa / Google Home integration
• Automatic content recognition and/or other data collection techniques
• Microphones or cameras, purportedly for voice/gesture control

My goal is to take a stock smart TV and completely neuter all of the above, resulting in an otherwise fully functional dumb TV. All of my content will be delivered over HDMI from external devices.

As I understand it, basically all modern TVs are running one of five operating systems: Android TV, webOS, Tizen, Roku TV, or SmartCast. Not knowing anything about these platforms, where should I begin? Which are most susceptible to rooting? Are there any good custom ROMs I could install that would achieve what I'm looking for? Surely others have asked these same questions before me, but I can't find the answers online.

Yes, this is a companion post to my other home theater question earlier today.