I love the idea that it can pull all my media into one place, but realistically it doesn't work with all apps - a particularly relavent example in this thread being that it completely ignores my plex - and is buggy with the rest, such as BBC iPlayer which usually correctly shows up in Apple TV app (all be it with a worse UI than BBC's not-amazing-itself app) but doesn't always show my latest next-up info.
I dislike it so much that I have watched illegal rips of Apple TV+ shows on plex despite having a valid subscription to watch them in the Apple TV+ section of the Apple TV app on my Apple TV device.
I have been using Roku TVs for years and if they have this feature I'm not aware of it. I also have various TV's around the house that have different OSes and apps...Plex can simplify that cruft.