Those leakage currents can still be a problem in modern gear.
Just a few days ago I was working on a home video system and got bit as I pulled out a metal-bodied coax plug while leaning on the case with my other arm. It wasn't exactly a powerful shock, but it was certainly more than a mere tingle -- enough to make me jump.
That was the combined leakage currents from two TVs, two VCRs, a DVD recorder, and a digital receiver.
