I sometimes think that it would be useful to substitute "cars" for "computers" in a piece like yours, Lancelot37!
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Indeed so. in my day, in the 50s/60s70s you could strip a carb at the roadside and effect a repair. These days you would need a degree just to open the bonnet. And once it was open you would not know what you were looking at. Progress? I wonder.
My last breakdown with a new modern car a couple of years ago resulted in the rescue truck arriving and being hooked up to be towed to the nearest agent. I asked the driver if he wasn't going to look under the bonnet. "No point" was his reply. "Nothing I could do anyway" It then cost about £50 to have it hooked up to a computer at the dealership just to see what fault came up on the computer. Progress - I don't hink so.