Week 4 Numbers have been added. While still ahead, 2019 is starting to fall back to the 2018 baseline.
Which is what should have been expected. The console still costs the same and the first quarter of the year is more often than not light on releases for Nintendo consoles. Going forward, Switch will more or less maintain the year over year gain it carried into this year on the back of SSBU. Maybe it will be able to add an average of 2-3k per week to its advantage in the first half of 2019 if things go well, but that doesn't amount to much.