AppleTV is the media box to use if you hate ads and value your privacy. Its Home Screen is just a grid of apps. No ads. None. It’s also way faster (CPU speed) compared to the competition.

Replacing a smart TV OS with a device made by Google or Amazon defeats the purpose. You’re still going to get ads plastered all over your Home Screen. And they still lag and stutter unless you pay a premium price for an 5 year old Nvidia shield. Either use an AppleTV or build your own HTPC.

I haven seen my LG OLED’s smart OS for years.

My LG OLED TV can be configured to load directly into a HDMI input. I keep it disconnected from wifi at all times. I never see the smartTV OS. It’s probably the best option because OLED panels are the best current display technology.

I use an AppleTV as an external media box for all my needs. But the same would apply for an Android box or HTPC setup etc.