"Running virtualenvs is "fine" until you're not connected to the internet, a less-and-less common scenario thankfully." Any high security environment (read: th

"Running virtualenvs is "fine" until you're not connected to the internet, a less-and-less common scenario thankfully." Any high security environment (read: the financial industry) will have most of the servers purposely not connected to the InterNet, to prevent people from doing exactly the above and from attackers hacking in. Energy and pharmaceutical industries - same thing. That's the norm, not the exception, so pretty much any industry which is critical for society at large won't allow access to the InterNet.