Been using one of the Analog demo boards, I think one of the ADIN1100 parts which is 10BASE-T1L instead, to solve a problem that occurred when I let a mechanical engineer order a cable for me. No twisted pair inside. Ethernet on either end. We barely found space inside the pressure vessel for the demo board (project at this point running on fumes, so instead of designing a tiny little board with just the few required parts I bought a pair of these boards), and connected the other one to the other end of a pair of wires in the cable.

Astonishingly, not only did it work the first time, it worked well enough to stream video. I'm hoping to see a more standardized PoDL interface crop up so that I can use two wires for data and power combined, for lower-power subsystems.

There's a lot of application for this standard, I hope it catches on enough that I can keep buying chips for it for a long time.