Switch 2 will be backwards compatible with Switch

They're being purposely coy though on what this actually means. Backwards compatibility with digital/e-games, or backwards compatible with the physical carts?

There isn't a technical reason to change the cartridge format. I don't see why they wouldn't just use the same carts if backwards compatibility is the goal.

there always is:

- smaller

- energy efficient

- cost saving

and they are all valid reasons, it's a handheld, the form factor will evolve until perfected

they could have made them smaller the first time around, but I have to imagine they intentionally chose not to — we have to remember that they're also optimizing these things for children... so smaller isn't always better for things like swallowing (which is why they add a bitterant to the current cards)