I think I switched to Apple from Roku when Roku and Amazon were fighting with every new streaming service and wouldn’t let you download their apps.
Since then, I just like how the Apple TV functions. So much better. I don’t have to log in through my TV provider for any app except Fox Sports. And the ones that are OTT, logging in is a breeze with iPhone. Scrolling is so much faster and smoother.
The Roku app on my phone, when I used it as a remote, I had to watch commercials and close ads and stuff. None of that with the remote function on iPhone.
There is also a very sharp contrast in picture and sound quality. Some of the apps, on Roku, I had to had to have the volume all the way up to hear anything. HD on Apple TV 4K looks as sharp as a lot of 4K content.
The layout on Apple TV is so similar to an iPhone that it’s simple. I’ve never had to wait for an app to reinstall on Apple. Apps are generally very buggy on Roku in my experience.