Continuing with this analysis, here is the Month aligned race between the NS and the DS.
This race is absolutely close, both lines seem to be merging.
Some highlights of this race:
1) The DS currently leads by 1.18M units.
2) The DS sold 1.9M units on January Year 4, so the Switch has to surpass this in order to shrink the gap.
3) On December year 4 the DS sold 6.3M units compared to the 6.0M units of the NS.
4) During Year 4 the Switch has beaten the DS during 4 of the 10 months.
5) During Year 4 The Switch is 1.3M units ahead of the DS
6) The Switch has currently sold 25.6M units in year 4, it needs 2.3M more during the months of January+February in order to beat the DS.