It's hard to be sure, but it seems like it could be a cultural shift more than anything else. The Wii, Wii U and 3DS had tons of little extra services and channels and what not that didn't directly relate to the games, and often felt like they were going for the 'toy' feel more than anything else. Meanwhile, the Switch seems to be designed like a simple games console with the games being the first and only priority and the extraneous stuff being cut out altogether.

Kind of like they wanted to go back to basics after the Wii U underperformed.