Not only that, but some services like Britbox purposefully gimp their system.
Supports AppleTV, Android, Android TV, Roku and Fire TV in the USA.
AppleTV, Android, Roku and FireTV in the UK.
Why have they decided to not support my Shield TV in the UK? Who knows but NowTV has the same limitation so sometimes you have to find alternatives.
See, I do have Netflix, Amazon Prime, Disney+ etc. but they each have their own app and even their combined coverage is not complete.
Do you know who has the (almost)complete movie&series coverage? Fmovies. That's where I watch most of my stuff lately, because of convenience. The legal content providers screwed it up again, once more they are not the most convenient way to watch movies and series.
Every now and then Fmovies would not have something, or I would like to watch something immediately after it's premiere and it would take more hours to be added to Fmovies. Sometimes I really like something I would like to keep it and make sure not lose it for re-watch or some movie has such a nice visuals that I need it in the best quality possible.
That's where Transmission comes handy.