Nintendo of America president Reggie Fils-Aime, speaking to Chris Kohler at Wired about the NES Classic's supply issues:
What happened with NES Classic is that was a situation where the global demand was well in excess of anything we had anticipated, and that’s what created shortages… Because again, how many times have you purchased the original Super Mario Bros.? We thought that the consumer that already had a Wii or a Wii U and had purchased those games once or twice already, we didn’t think that they’d buy the NES Classic. And they did.
I know a lot of people were worried that the Nintendo Switch would suffer from the same supply shortages as the NES Classic and the many Amiibo released over the last few years. I've been saying for months that the Switch situation would be different; my guess was that Nintendo vastly underestimated the popularity of toys like the NES Classic and Amiibo, and that surely they wouldn't make the same mistake with their major console launch. Nice to see Reggie confirming that, and also reiterating that Nintendo will have 2 million Switch consoles to ship worldwide in March.