Random musings: Looking at the base SI units, we use A as the base unit (because it was easier at the time to measure accurately) rather than C. It would seem now we would swap them around so C is the base unit and A is derived.
But the one that interests me, then we almost always multiply base units together except for time, which always ends up being divided by. Should we be swapping time and Hz as the base unit?
Sv being J/kg is kinda a lie on that chart: it's more accurately the amount of radiation that would provide biological effects equivalent to that amount of some standard spectrum.
I don't really see much of a difference between starting with time and frequency: we define all of that by "one period of <some lightwave>" anyway, so we essentially start with frequency. We also divide by units of surface area in quite a few places.
Re charge: amusingly 1 mole of electrons is something like 96 kC.
