Internal storage. I have 70 cartridges, 5 64gb sd cards and a 128gb sd card. Kind of nerfs the portability aspect.
That's something I expect in an update to the Switch next year or in 2021. An expansion to 64 or 128GB internal memory instead of a pricecut. For a Switch 2 in 2024 I would rather expect 256-512GB of internal memory, though.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454