Microsoft was able to make that sort of decision cause they weren't in any real trouble, and it's not like the OG Xbox was a complete flop, I'd say it did fine enough.
Nintendo on the other hand is in a pretty bad position, considering that the Wii U did horribly, and they can't afford to make any more huge mistakes if they want to remain credible.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."