So Switch, according to VGC went from 13'1M in 2017 to 17M in 2018, a 30% growth YOY. We know JP is 6%, USA is 14%, UK is 20% and France is 24%. So making maths compared to 2017...
13175k (worldwide) - 3324k (Japan) - 4880k (USA) - 736k (UK) - 911k (France) = 3324k in the rest of the world; so US+JP+UK+FR = 9851k
in 2018:
US 5585k + JP 3549k + UK 830k + France 1091k = 11055k, a 12% growth YOY compared to 2017.
16963k (total worldwide) - 11055k = 5908k in the rest of the world, a 77% growth YOY compared to 2017.
I really think that growth in those markets, outside JP, US, UK and FR is just too much. VGC shows a 40% growth just in Europe when UK+FR+GE seems to be around 20-25%. Those countries represented 65% of total Europe sales in 2017, now they only represent 54%. I expect some adjusting coming from Switch in the future...
PS4 also seems like it needs some adjusting coming from previous years, because despite the total matching lifetime sales data from Sony, it shows 17'7M for 2018 when it should be closer to 18'0M.
As for XBO, well, we'll never know for sure if the numbers are right or not, so no point in discussed them at all.
If in the end the numbers end being right i still will be satisfied with my prediction at the start of December:
PS4 18'0M, VGC shows 17'7M (being 18'0M the official number from Sony)
NS 16'3M, VGC shows 17'0M
XBO 7'1M, VGC shows 7'3M