Trimesh
Banned
Gamecube, the Wii/WiiU hardware, already worked perfectly out of the box, aside the splitted memory, unified on Wii. It was a highly reliable hardware, like Wii or WiiU.
Switch's Tegra T210 was already included in a few devices (like the Google Pixel-C tablet) way before Switch release. So it was a fully tested and probably cheap solution. It wasn't the best idea of the day in the long term, since T210 delivered 20 million of Fusee Gelee vulnerable units to the market. But oh well.
I think the last genuinely bleeding edge product that Nintendo had was the N64 - and that honestly ended up biting them on the ass due to the combination of development delays and high initial cost for the parts. Everything since then has been designed around stuff that was already well characterized, which typically means it's going to be at least somewhat old.