Code is too reliable, in many cases. If you don't do your 100 and 500 hour PMs and change the fluids on a bulldozer, then it will pretty reliably break down or

Code is too reliable, in many cases. If you don't do your 100 and 500 hour PMs and change the fluids on a bulldozer, then it will pretty reliably break down or render itself into a smoking million dollar chunk of scrap iron, in spectacular and unavoidable fashion. Software can limp along broken without anyone noticing for far longer.