I think, since a lot japanese people own a switch, but not pc or playstation console. Such people would be the target audience of that. Not everyone has multiple consoles or systems, some only one from nintendo.

I guess you have the game sizes from steam, playstation’s game versions are smaller. I would imagine the nintendo version is even smaller. Cyberpunkt is inside a 64GB Cardrige, so for sure smaller than 100GB. And the SD-card are noch proprietary, they just the fastest one currently on the market that got support, every express sd card should work. They will be cheaper and bigger with time as well.