We (I) spent a lot of time talking to several different teams at Nvidia about this. We were able to get VFIO vGPUs to the point where guest libraries would recognize them, but the process fell apart in the guest/host licensing dance, and we weren't really OK with the idea that there'd be a phone-home licensing dance every time a Fly Machine started. Unlike GPU enablement at GCP or AWS, the core DX of a Fly Machine is that it stop/start very quickly; think of it as a midpoint in the design space between Lambda and Fargate. This is what we're talking about when we say it's hard to fit GPUs into our DX.

It is quite possible, bit surprised a minor systems detour would burn months but alas. This inspires me to figure out how to sell it, sounds expensive...