It's nice that you can unlock the bootloader on these and flash Lineage if you want to limit snooping by Google.
That being said, I think that you get more flexibility and performance with a mini PC and and air mouse. For one, stock (Googled) Android does not give you an easy way to use a browser with an ad-blocker, which is still the best way to stream from many sources without ads. Also all these anemic Android boxes struggle with high bitrate 4K videos.
You unfortunately lose Widevine support when you do this though (either switching to LineageOS or a mini-PC). That means you can't stream any of the mainstream services in anything like a half-decent quality.
It's very unfortunate that every streaming service has given up on supporting anything except Google-fied Android and Apple iOS/tvOS. I dont like the services to begin with, but a fully Jellyfin stack can only get you so far when there are niche requests involved as well.