This. The premise of the article is that the hydraulic analogy breaks down for semiconductors. My reaction: no kidding, a classical explanation doesn’t cover

This. The premise of the article is that the hydraulic analogy breaks down for semiconductors. My reaction: no kidding, a classical explanation doesn’t cover fundamentally quantum devices. The whole premise that your model should only need small tweaks to evolve seems wrong. The author has probably forgotten their first encounter with quantum mechanics. It’s not a small tweak. It’s a bewildering change. Is it particularly wrong to be using hydraulics to explain MOSFETs? I’m not qualified to have an opinion on this; maybe someone is holding on to the analogy too long. For classical effects it works well.