The service? The Hardware? The App on the hardware? (Great job naming Apple...)
I agree that the Apple TV is the best experience one can have. It can be further enhanced by using a single app (Plex/Plezy/Jellyfin/Infuse/etc). Jumping between streaming services and their hostile, horrible UIs is such a pain. The Apple TV app was meant to improve that situation but without buy-in from all the streaming providers (which they will never get) it's always going to be playing second fiddle to the high seas.
It's not. Netflix is a _very new_ addition (last year) to the Apple TV app (which is ironic seeing how Netflix was highly integrated into ATV before they moved to apps on the ATV).
All of your services might be represented at this point in time but it can (and has) changed over time.