This. These supposedly risk-averse organisations also have no concept of the risk of stasis, only the risk of change.
The general premise was, if you apply an update and something breaks (note that "changed behaviour" means "broken"), someone's head will roll. If you do nothing and get compromised, it's those damned <country> hackers again.
Never underestimate the management's ability to fire a Enterprise IT workers for applying an update that the developer's swear changes no behavior in the companies enterprise software, but actually does.
// been on both sides, we suck at testing and risk assessment in this profession
Workstations are often locked down, so employees can't install or upgrade anything.
The second most popular version? IE 6. Not even 8. IE 6.
Who still uses it? Employees of other government departments...
(Disclaimer: I work on analytics.usa.gov.)
It gets worse... People write apps that use Flash (online training) or Java applets.
There are solutions to this, but none of them involve using the one true SOE, one SOE to rule them all!
Companies and citizens, live with that.
But sadly no, they don't follow this kind of stable release.