Oh, good point, I forget about that! They actually went asymmetrical first with the Gamecube, then symmetrical with the Wii pro controller. The Switch is asymmetrical out of necessity, and the Switch pro controller probably is because the joycons are. So it really is only Microsoft always preferring asymmetrical.
Nintendo switched from symmetrical to asymmetrical after the Wii U
Oh, good point, I forget about that! They actually went asymmetrical first with the Gamecube, then symmetrical with the Wii pro controller. The Switch is asymmetrical out of necessity, and the Switch pro controller probably is because the joycons are. So it really is only Microsoft always preferring asymmetrical.