[exmadscientist]

Hall sensors have a lot of issues. If you can handle the power dissipation in the resistor, a shunt plus a fancy zero-drift difference amplifier is almost always going to be superior.

Hall sensors win for very high currents, high bandwidths, and when isolation or noninvasive measurement is required.

[Animats]

Technically, yes. That's how most meters work. But now you have high current, high voltage, and isolation issues in your sensing device. So you need more testing and approvals.