This I'm aware of! From what I heard Switch is even easier due to better availability of documentation surrounding the Tegra chips.

I doubt a different architecture would stand in the way of some of these people. Wizardry :)

eh, as a former contributor to Dolphin, and a current game developer who has worked on the Switch, I'd say Dolphin has it quite a bit easier easier -- the GX API maps pretty well to modern GPUs, the lack of programmability means shader recompilation & reverse engineering is far from as big an issue, and Dolphin doesn't have to implement from scratch a giant OS and all of its services.