How different would it be for game devs to change from the X1 to This for the Switch Pro if anything like it where to come into existance

PC-LAD
How different would it be for game devs to change from the X1 to This for the Switch Pro if anything like it where to come into existance

I guess whole lot.

Interesting device. I would consider buying 1 for play it that would be 5 to 10 times cheeper