A portion of all of those sales are scalpers, they literally bought up most of the stock of Switches in the Houston area the first month, multiple sources from people working at Targets, Walmarts etc confirmed this, they didn't see individual people buying each one, they'd see 1 or 2 people come in and buy their 12 or whatever they got in stock and leave, all I have to do is look at the Craigslist for the Greater Houston area at any time, half of the posts on the Video game section are Switches, I've seen pics of someone with like 50 stacked up in his garage. I'm sure in most cities it was the same.
Now I have not numbers to back this up and there's no possible way anyone could come to a guess on it, it's just being very active in the local gaming community it's what I and everyone else have seen. Luckily stock is coming back, prices that scalpers are asking for are going down (because more stock is making it to all stores), so getting one is not that hard.
Having said that I really do like mine, but it was an impulse buy because I had a lot of cash on hand after selling off most of my retro collection so it was small change, and thought why not I'll see what the hype is.
Zelda is probably one of the best games ever made and will go down in history as such, I'm currently working through it on my Switch, daughter is about finished with it (and all side quests) on the WiiU.
Anticipating Mario Kart and Splatoon 2.