What's "CS"? Unless it's Outlook's calendaring, I doubt it will have any effect on "the enterprise". Remember, most people only use their computers to send email, setup meetings, and browse Facebook.
CS is shorthand for Creative Suite. A collection of several Adobe products into one package available in several flavors.
Correct, but a large chunk of corporations have in house creative departments and many(if not most) use macs. Killing the Mac version of CS would force them to switch back to PC.
Or continue to use the last available version for Mac until a viable replacement is available for their preferred platform.