[Shared404]

> Every game card is playable, no matter how out of date the Switch is, without any internet connection.

This is mostly accurate, but not entirely afaict. I had to connect my switch to wifi in order to update the OS to play Xenoblade 3 (or Tears of the Kingdom? It's been a while).

[gjsman-1000]

Might be TOTK; I personally updated an offline Switch to use Sonic X Shadow Generations from the cartridge alone yesterday.