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.
Audio passthrough for Dolby TrueHD Atmos and DTS:X