One of the things I’ve noticed and was shocked by the Switch is how clean and fast the System UI is. Having dealt with sluggish Operating Systems on past consoles for so long, it’s so refreshing to have a console that takes literally only a few seconds to get you right into the game. There’s almost no bloat to the Switch: it gives you just the essentials you need to get started. This should be the standard for all consoles going forward.
Why do you assume this is the OS? When Nintendo puts out their online system, there may be something else entirely.