I have exactly one reason to fiddle with my smart tv: to use an youtube app with adblocker and sponsorblock. The first could also be achieved by buying premium. But sponsorblock? No, I need to be able to sideload apps for that.
SponsorBlock on my TV would probably be the biggest single value add feature I could do. I pay for YouTube Premium because it is cheap so it is worth it to remove the YouTube ads but it is frustrating how much sponsored crap there is in the videos themselves these days and SponsorBlock is wonderful in the browser.