Re:Raspberry Pi 4 can finally boot directly from USB
by MayeulC on Saturday September 19, 2020 @06:43AM
(#24526501)
Pine64's offering is pretty good, and they are all-in into open source, although their boards might be a bit less competitive now that the RPi4 is out. the Rockpro64 for instance has a PCIe connector.
https://www.pine64.org/
https://www.pine64.org/rockpro64/ http://wiki.pine64.org/index.php?title=ROCKPro64