But every time a PC dies, it's going to take some number of days to get a new one, or repair the old one. If you lose the c: drive, you've got to reinstall all your apps, projects, tools, email, network stuff, and Windows settings (which will never be quite the same.) And maybe spend an hour on the phone with Microsoft convincing them that you really did just replace the motherboard. If you're an engineer, not even a leprechaun, that time is worth a whole lot more than a few hundred dollars.
I figure that one design engineer should design about a million dollars worth of stuff every year. That is, a man-year of product design should sell a million dollars worth of stuff over the product lifetimes. That's $4000 per working day. So why have him mess with crap PCs? Or sit in a bad chair? Or use flaky test equipment?
John