What a stupid title. As if anybody's buying smart devices in the hope they'll be worth more someday.
My on topic advice: if you rely on your smart TV to get to your content, you're going to have a bad time. Get a small computer instead, and treat your "smart" TV as a monitor, nothing more.
I did get myself an nvidia shield last year, and after switching out the stock launcher for something that doesn't show ads (and better yet, launches straight into plex at boot), I couldn't be happier.
Yes, I still love my Shield, but there's no doubt it's getting long in the tooth, and there aren't any true replacements on the horizon. The Shield has also lost some features through time, like Nvidia's local game streaming, though Moonlight and Steam have helped fill that gap.
Out of curiosity, which is the launcher you chose?
I froze the stock launcher at the last version without Ads. It works, but I guess some entries like "continue watching" could be bugging out now because it is out of date/never patched.
I was getting "suggestions" to install apps for streaming platforms like Disney or hbo which I had to scroll past before I could start the apps I installed myself.
Maybe you're on a different firmware version from me.