No idea why this wasn’t. Often times they’re not for this reason _and_ because the hardware itself is too difficult or impossible to get online and can’t be upg

No idea why this wasn’t. Often times they’re not for this reason _and_ because the hardware itself is too difficult or impossible to get online and can’t be upgraded. Forget networks for a moment - a system running Windows XP is way less risk than an upgrade to Windows 7. Plenty of companies have older systems running vital hardware that if it went offline could cause massive outages, revenue loss being only one if the impacts. So air gapped networks are pretty common in ICS environments as a result.