>>> Companies frequently stick to what they know and have invested into, so long as it still works. This. For example I'm still on Java 1.6 because the cost of

>>> Companies frequently stick to what they know and have invested into, so long as it still works. This. For example I'm still on Java 1.6 because the cost of migrating to 1.7 (java is not the problem, the libraries we use are) is big. I'm still on Solaris because moving to Linux (for example) would imply redeployment of thousands of programs which translates to ten of thousands of man/hours. Big corps go at geological speed :-)