Currently Online 
The full data for 2025 isn't out yet but it looks like it'll have sold around 16m in its first 7 months compared to the Switch 1 selling 13.1m in its first 10 so an extremely strong start though there are signs that it's starting to slow down after its record shattering launch with it looking like it had a worse first holiday season compared to the Switch 1 though big differences compared to 2017 are the lack of a massive exclusive like Mario Odyssey for the last stretch of the year and the console market being being in a rough state in the US currently.
The most important thing will be if its first holiday is an outlier and it does fantastic throughout this year or if it is really is starting to slow down in a significant way and will have a significantly more frontloaded sales curve due a lot of people getting theirs quicker than usual due to them knowing that it probably won't be getting a price cut ever and instead will get more expensive over time if anything so they may as well do it as soon as they can.
Due to that factor I personally think it has notably slowed down now and could slow down more after a likely price increase in the coming months though I still expect it to outsell the Switch 1's 2018, just not by that much so like 17-18m compared to 16.3m. The Switch 2's line-up this year should be better than the Switch 1's 2018 so even though it probably won't be selling extremely well any more that should help keep sales momentum up enough to still have a great year.
