Well then, that would be cool. But those were 3DS cartridges, which price depreceated over time. Switch carts are an entirely new beast from 3DS cards. Doesn't that play a role in price? Of course if Nintendo buys in bulk, they can get some cheap prices. I hope that high compression is an option for developers, but something's telling me Nintenod's going to want us to use sd cards for bigger games. It's just the Nintendo thing to do at this point. Now that I think about it we'll most likely get more than 32gb cards later as 3DS didn't get 8gb cards until later after launch.
If it also means anything, wikipedia has Switch with a max 128GB card size : https://en.wikipedia.org/wiki/Nintendo_game_card
So, I'm probably just putting too much on these documents at this point.
As far as I'm aware the cart technology beween the 3ds and Switch carts is largelythe same. Switch carts will be higher capacity and read speeds as well as a die shrink but it's still the same technology. Also, there is no 32GB 3DS cart the maximum is 8GB currently, I belive, so between that and the die shrink they were clearly talking about Switch carts.
As for 128 GB, it's certainly possible, but I'm not sure what the price would be. Nintendo really gains nothing by making us buy SD cards for big games though. They are not proprietary like the Vitas so Nintendo has no profit in that. This is mainly about 3rd party ease of developement and game production cost wich Nintendo by all accounts is very aware of with the Switch.