It’s a weird assumption. Like I said, emulation for backward compatibility is common.

Nintendo has some serious emulation experts for building products, but this setup rigged by some museum staff could be anything.

Do they always just wait for some random strangers to implement an emulator for them?

Waiting? There is zero chance availability is an issue. There are many ready to go snes emulators for windows out there.

They have literally had their own emulators for so long. At least since the SNES Classic released. It is called Canoe