I'm still curious how that can be done. The cart is unwritable so the game has to be installed just like any other modern console. But with only 32 GB internal storage, that will be filled up fast.
What are you talking about? Did you have to install 3DS games? Or like.. any other cart-based game, ever?
The game is unwritable, like any disc-based game, which means you need a memory card for saves and updates. The Switch uses normal, generic, non-proprietary SD cards for its memory. So if you run out of space for your saves, DLC, or eShop games, you just... buy a bigger memory card like you always have, only this time they'll be incredibly cheap because they're generic SD cards.
Also, it's Nintendo. You didn't need to install games on the Wii or Wii U (save for like, what, two or three? and even then they weren't even the full game)