Jeez supply being an issue incredible i blame ring fit

Pun intended?

Nope

PS4 numbers look abit low dont they? in US and EU.

^ this.  I think if any of the 3 are likely under this week, it ll be the PS4.

2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019. Ten years and notice how 2019 is the last of the 10s (2019) so yes.

You start counting from 2011, because the Gregorian Calendar starts from 1CE.

Don't be so sure. That depends very much on where you are and who you ask.

In fact, the notion that decades end with 9 came only up with the millenium bug, where nobody knew what PCs would do after the clock rolls over after 99. Before, decades, centuries and millenia were counted from x1 to x0, xx1  to x00 and xxx1 to x000, respectively.

Do you think Switch can have a higher week 52 than week 50 ?

Nope we start from the 0 now days hence why media outlets also do the same in classing 9 as the end the Gregorian calender has no bearing on this.

All you've done is give the reasoning for counting from 0 it doesn't disprove what I said especially as 0-9 is what we do now days pretty much in most places what they did centuries ago doesn't matter as we never used to put the clocks back and forward before the war but now we do.

There was no registered year 0 so our calendar starts any decade/century/milenium on a year that ends with 1. The last year in those always ends in 0.