Why doesn't Nintendo fire up the old factories and re-produce *exact* copies of many of their most popular games, controllers and consoles?
I am unsure whether this qualifies as economics, but it would be something that might be discussed in business school. Furthermore, the answer is almost entirely engineering. As such, I will do this briefly.

Those “old” factories are probably in the same physical space as their current factories. They would need to build new facilities.
They would need suppliers to retool to manufacture obsolete electronics.
The cost of producing the old hardware would be much greater than using a modern CPU and emulator software, where they can package the entire library in one piece.
The video output would probably be useless on most modern TV’s.
Who is going to be willing to warehouse and retail these games? If they use emulator software, they can stick the entire library in one package, vs. one package for each old game.

These engineering problems imply a need for a large market, which is uncertain. Would collectors be willing to pay the same amount for copies of old games, or would they demand the “authentic” versions?