I have 2x PCIe X16 and 1x PCIe 1x slots that are not being used.
Given that Linux has extensive hardware support, there are probably users with interesting PCI card usages
Aside from traditional usages like network/wireless/bluetooth/sound that can easily be used as USB (or built in advanced sound support in the MOBO), what are your use cases with PCIe?
I have an extra PCIe USB card I can use for Virtual machine pass through (sometimes it's useful to be able to pass the entire controller instead of just a device).
I was thinking laptop. It would be so much less clunky without the external USB and antenna in the field. Or, damn, even a phone! Now I finally have a reason to even think about Librem 5.