Where do the Third Party/Nintendo fan issues come from?

[Soundwave]

Choosing cartridges for the N64 did it.

If Nintendo could back in time and redo anything they would likely back to 1992-1995 and totally change that decision, the game industry would be very different.

Even after the break with Sony, they have multiple chances to still put a CD-drive into the N64 (they still had a deal with Philips for CD drives), which IMO would've won them that generation.