PP3 is a good tool, but test lights and volt meters are still useful, espicially for our old cars. Sometimes (many times) you need to load a circuit to find the problem. A PP3 will not do that, but a test light will.
PS: I wouldn't use a test light on a modern "computer" car.
PPS: I also still have a landline telephone. The last time we had a power failure due to a storm, it worked, and the cell towers didn't.
