Maybe addional hardware wouldn't even be needed. Onboard soundcards should be good enough for ASIO (they work fine on Hackintoshs and Core Audio on MacOS). The reason why it's not offered is the licensing I think, it's properietary technology from Steinberg, a German company who invested into Windows pro audio early on and kinda got a first mover advantage there.
I don't know how much licensing would cost, but Framework could possibly offer a driver for the internal card as an addon. Then the slot could be used for a small headphone amp which would be more third party friendly I think.
I don't know how much licensing would cost, but Framework could possibly offer a driver for the internal card as an addon. Then the slot could be used for a small headphone amp which would be more third party friendly I think.