Comment by nine_k
I bet that friendly Chinese entrepreneurs will sell inexpensive E1.S to m.2 adapters, and maybe even PCIe riser cards for putting an OAM and a bunch of fans, and maybe even an HDMI output. Good hardware won't be wasted, given some demand.
Inexpensive, probably not. E1.S isn't just a different connector, it's a completely different protocol than PCIe.