Is the energy consumption inherent to 10Gbase-T? Or is it that 1Gbit nics have been around forever and optimised ad infinitum?

To be fair, the power consumption is also my biggest gripe with my WiFi 6 AP, they run extremely hot.

It's inherently worse than anything fibre, or even DAC cables (which are kinda cheating.) It needs a shitton of analog "magic" to work with the bandwidth limitations of copper cabling.

Just wondering why you considered DAC cables cheating, is the analog magic mainly the impedance matching or I'm missing something?