What always gets me is the enormous systems that were wirewrapped - was this all pre-multilayer PCB, or was the reliability of multi--layer still suspect - double sided mil-spec board here has to use eyelets for vias until recently I am told.
I worked, in the early 80's, with systems where the 'main logic' was enormous wire-wrapped panels and the 200/556/800/1600 tape decks (remebeer those?) had two layer boards.

I spent countless hours, in several locations, hunting the one bad wire wrap (there was always one) and a Christmas and New Years in Paris, France supervising 3 techies soldering resistor wire into all vias (they were plated, not eyelets) to make sure that no more vias broke the connection.

No, IMHO both old plated vias was and wire wrap is - insert expletive here - crap. I, basically, would rather have a connection system that had 10 totally bad connections than the above that typically had one intermittent one.

Erik

To make Richard not insert his usual 'wisdom' here, the wire wrapping was NOT done by hand it was done by huge automatic wire wrapping machines "the best money could buy" the same machines were approved by and used for mi;itary stuff.