So, from what I can see, even if Switch ends up being flat YoY from 2020 they will still end the year being around 5-6M units away from NDS, then the NDS will have it's 2009 holiday period which, by years end, will be at 120M units.
In the near future, unless Switch has an absolutely stellar Q1 start, Switch will likely be almost 14M units behind DS after DS's holiday period. NDS sells another 21M in 2010, and then just 13M the remaining years. If Switch can sell 20M in 2022, then it would need another 27M lifetime to outsell Nintendo DS.
For me, this is looking more and more unlikely, and I'm sticking to Switch ending at the 135-140M mark.
Edit: Woops, looks like you beat me to all of this above!







