The Switch has sold around 500k more units in Japan than the PS4 in 2017. Even if you double it that's 1 million consoles. How is it ever going to get 15-25 million more than the PS4?
Meanwhile the PS4 has sold 3 million more units in Europe than the Switch. Even if you subtract 1 million since PS4 has January/February sales that the Switch doesn't have then it's still 2-4 times more than the gap that the Switch has over the PS4 in Japan.
Europe has sold 9 million consoles total so far in 2017 and Japan has sold 4.6 million consoles total so far in 2017. Europe holds twice as much importance because its twice as big as Japan in terms of market size.







