As an aside, I feel the analogy in the introduction undersells Ohm’s law. This is not a commonly understood (or explained) point below the college physics level

As an aside, I feel the analogy in the introduction undersells Ohm’s law. This is not a commonly understood (or explained) point below the college physics level, but it makes the already overstretched statement that “[t]he best ideal models are simple” almost painful: as far as linear laws go, Ohm’s law is a miracle. Sure, there are linear approximations to almost everything, but with a few exceptions they fall apart the moment you look them funny, especially the bulk ones (like Ohm’s law instead of like the diffusion equation). In short, you’re much more likely to encounter linear drag than Ohm’s law. The best ideal models are simple. Unfortunately for ideal models, more often than not, data says no[1]. [1] https://tapas.io/episode/1722940 https://tapas.io/episode/1722940