DS has sold almost 155 million, I don't think the switch will reach that, I don't even think the ps4 will reach that, they might pass the Gameboy, maybe.
Reason is - DS was a total portable device and was backwards compatible with GB advance, there's really something that the switch cant do, close the device so the screen is protected and put it in the pocket or bag. You can always get a case for the switch, which will make it even bulkier and its not as good as just opening the screen and play, true portable device.
Also price and durability, most these portable devices are sold to parents who buy them for their kids, specially on Christmas, I'd say 75% of all portables, so it makes sense if parents want to spend less money on the gift.
Also, games for DS were much cheaper, so people could justify more a DS as they could get more games + they could run their old GB advance games.
Also, a lot of the DS market was adults/elders wanting to play puzzle games like brain training and such, so they were basically not gamers, they just wanted to play puzzles, cards and sudoku with the pen, which was perfect for that type, specially with the dual screen, the switch doesn't have that.
I remember back in the day I actually bought one mainly for that, because I never play out of the house, so my DS was a puzzle machine, but my switch I bought it as the next Nintendo home console, not as a portable.
Lets be honest, take out the puzzle market and the total portable market and market for people who want cheap games, and that means the switch will never reach those sales, because its only sold to gamers.
The switch adds the old Nintendo home console market, but most are the old fans like myself, looking at the gamecube and N64, that means around 25-30 million consoles for the fans, which most already bought one.
As one of the biggest Nintendo fans since the early 90s, I wish Nintendo would just make another powerful home console instead of a very underpowered hybrid, I already saw Breath of the wild running on a good PC with 4K and AA, it looks way better, and that's what we could be having on Nintendo consoles.Last edited by victor83fernandes - on 17 February 2020