I have a 2019 LG OLED. I use the TV remote to control an Nvidia Shield via HDMI-CEC.

Some apps work "better" on the TV (Netflix, Amazon Prime) since I can get Dolby Vision from the built-in apps. Other apps (Disney+) are horrifically buggy on the TV and I use the Shield for them.

I have not enabled all the snooping that LG wants, and so I do not see any ads. If I ever start to see ads, I'd factory reset the TV so it forgets my wifi, and use the shield or an Apple TV.

I also use the shield for and ad-free youtube by using SmartYouTubeTV on the shield.