Never had one in the 20 years of building new and used. Apart from the normal wear you get on mobile cables. I suppose I'm lucky then?
i've had a lot in the past 25 years(mine bigger), but i do cycle gear a lot in the last 12 months i've had around 15 CPU's and this year i've already have 4 GPU's
I like to buy random stuff and play with it, that's the fun part of owning a pc for me.
i suppose if you a 3 to 5 year type of a person it's less likely that you run into bad parts
the last cable i had to return to a different shop not ocuk but a proper shop was a 5v Molex to 3x fan cable that was wired to 12v