It has been one year, so I would like to update again. Sorry for the wall of text in advance.
As of September 30, 2021 (19 quarters)
Japan- 22.06m (59.6%) +16%
Americas- 36.31m (62.6%) +16%
Europe- 23.60m (48.1%) +12%
Other- 10.89m (41.9%) +12%
Needs about 2.5 more years of peak sales to make it in Japan and America. 4-5 more years in Europe and Others.
Compare to top consoles at 18 quarters. (Switch still gets 1 quarter handicap.)
Japan (DS, 18 quarters): 26.39m (83.5%) +11%
Americas (Wii, 18 quarters): 41.18m (88.1%) +9%
Europe (PS2, 18 quarters): 31.41m (75%) +4%
Switch actually gained a little on the top consoles, due to having a later peak year, but it is still behind them.
Now @Ryng also predicted 170m and predicted 70m for Americas, it is now at 36.31m. He predicted year 5 to outsell year 4, but right now it is down YoY.
Disclaimer: I am not reviving this post to annoy or make fun of. I just find the Switch's sales trajectory quite interesting.
I also just realized that I didn't make a post about the actual thread last year, so I will do that now.
I am predicting quite early right now that the PS5 won't outsell the Switch or the PS4. Why? Because of Sony's actions. They want more profit, not Unit sales. I have been saying it for years. In addition, consoles are more front loaded these days, and with the limited supply of sensors, the sales potential is also limited. PS5 might stay at $499 for years.
Do you think you could boil this all down to a single number? How much do you think Switch will sell lifetime? If you want to break it down by region, that would be better, but really I am at least looking for one number.