- Almost every first-party multiplayer Nintendo game on the Switch that I know of has offline local multiplayer. The only exception which comes to mind is Splatoon.
- The Switch has a cartridge slot, and leaks suggest the Switch 2 will too.
- And you can connect two (possibly more with a hub) Pro controllers with a true wired connection: https://en-americas-support.nintendo.com/app/answers/detail/...
Fingers crossed that the Switch 2 maintains this pattern.
I am a little disappointed they don't have anything like the DS's download play feature though.
It does, but it's hidden behind an unlisted button combination (Zl + Zr + L3 for Splat 3) and every player needs their own console and copy of the game: https://splatoonwiki.org/wiki/The_Shoal#LAN_Play