Electricity is obviously fundamental. But I think that soldering (and the PCB, as @AWildC182 pointed out) facilitated certain widespread uses of electricity li

Electricity is obviously fundamental. But I think that soldering (and the PCB, as @AWildC182 pointed out) facilitated certain widespread uses of electricity like radio and television that wouldn't have been democratized quite the way they were without it. i.e. TVs and radios would've had to hew to size and assembly labor restrictions of screw terminals and such.