CBL (not sure about Mariner specifically) had builds targeting hardware, AFAIK. I recall ~2016 that Azure was running their own Linux images on various parts o

CBL (not sure about Mariner specifically) had builds targeting hardware, AFAIK. I recall ~2016 that Azure was running their own Linux images on various parts of the gear, like "Smart NICs" in VM hosts that cooperated with SDN driver in Hyper-V.