[lxgr]

> Modern apple hardware has a second wifi modem

Do you have any sources for that? As far as I know, it's just time-sharing the same baseband and hardware used for regular infrastructure-mode Wi-Fi.

[klabb3]

> Do you have any sources for that?

No, I should have picked my words more carefully. All I know is that they can be part of two networks at the same time.

[lxgr]

Ah, yes, they can! But that can be done by cleverly timing the usage of a single hardware interface as well :)