> If the computer isn't connected to a network, then hell, there's no reason not to run > whatever OS works best for your workflow. It's just that if you're running XP or 95 > or 3.1 or whatever because of the need to control some old CNC machine or scientific > equipment, it'd better be air-gapped.
Air-gapping didn't save anyone from Stuxnet. You need to be damn careful if you want to run unpatched and not get pwn3d.