also when they see this post

I find sitting easier than standing. It requires less attention (atleast if you have standards of the waste actually being in the pot).

In general ac units are heatpumps. Efficency gains would be had from building insulation.

The switch to steam was not just speed. More important than speed is to reliably arrive when expected. Which modern freight does (by and large). The few cases where speed is actually needed probably wont be enough to finance an entirely new transport medium, but we will see.