> On-board graphics, audio and NICs usually are shitty anyway.

Onboard graphics, audio and NICs are perfectly functional and more than enough for most people. Both in work environments and at homes. They've not been in a shitty category for years now. They won't break any records, but they will display websites at high resolution, play clear music, and provide more bandwidth than the link to the internet can handle.

Just look at the number of Lenovo's AIOs (and similar solitons) in offices.

> Full USB-C (or ongoing USB-4) means Thunderbolt which is PCIe.

USB 2 is a fraction of the price. (And power and board space)