SMB3 was not a fluke. It was not an accident. Super Mario World is living prove that Nintendo could absolutely just do it again whenever they wanted. Super Mario World is only worse than SMB3 because it has too many ghost houses. That's it. It's beautiful and smooth and clever and whimsical and it has one of the best soundtracks of all time.

They did it again, and it BORED them. Nintendo stopped doing this because they'd already won. The only thing left to challenge them was a third dimension, and they'd soon demolish that too.