Flashcards for Nintendo Switch?

Why are there no flash cards for the Nintendo Switch? (there were also some with the 3Ds)

I think because Nintendo is already behind it to prevent something like that

Since there's not even a really good soft-mod method so far, you will have less control over it, without making the console think the card is legitimate. In addition, the games are partly damn big, which would require huge SD cards.

TL; DR: Security mechanisms have not yet been cracked.

OK thanks