Through twelve fiscal quarters:
Switch - 52.48m
The PS4 shipped 20.1m in the following four fiscal quarters, so Switch must do 15m+ to stay ahead through four years. Doable, despite the upcoming ~2m in January to March 2020.
That seems completely unnecessary. Nintendo's forecast for the rest of the fiscal year (19.5m for the year, so 1.76m to go) makes it clear that there's quite a bit of excess stock after the holiday quarter, so the previous 2.5m gap you had was going to correct itself naturally to a more sensible gap between LTD shipments and sell-through. January to March 2020 is poised to have higher sell-through than shipments.
Please, tell me you're joking. We both know nintendo doesn't expect such low numbers.