To be clear, this doesn't just contain the source code of the software. It also contains the Verilog for the N64 GPU and other important hardware component, which is hugely important. From what I gather, it also contains full version history from their VCS. While it is very interesting, it's worth noting that anybody hoping to use this for anything "serious" risks getting the Nintendo lawyers on their ass. Emulators…
Now would be the time for Nintendo to seriously consider open sourcing some of this stuff so they have a chance to put it out there legally and in a way that benefits them, instead of the current situation where it only benefits shady outfits selling aftermarket raspberry pis loaded with illegal ROMs, that were never going to partner with them anyway.