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Consider how slow the OS on Wii U was and how fast the Switch OS is.
That is why most of these things aren't there. Nintendo made a very un-Nintendo move of sacrificing the jingles/etc in the UI in order to make the use of the console not annoyingly long (in fact pretty snappy compared to any of their consoles over the decades).
If they were to add some of these things, battery life and performance (load times etc) would suffer and then we would actually realise just how much better the current experience is