To be fair I used the word "should", as in I believe that it would be best practice, at least from the perspective of user experience, to operate below the OS.

To be fair I used the word "should", as in I believe that it would be best practice, at least from the perspective of user experience, to operate below the OS. If that were the case, input switching wouldn't be dependent on the speed or reliability of the OS. As you point out, it's not strictly necessary if the OS is responsive enough and reliable enough to begin with.