Unfortunately it's not a matter of sticking fingers in your ears, I can tell you. If you've got 50-100,000 workstations to worry about, and a couple of intranet apps that only run in older versions (there are more of these than you might think,) upgrading IE could be a fabulously large and expensive project.

Still you gotta catch up at some point. The product I work on is dropping IE8 in January, which will cause some of our larger and less nimble customers to get stuck on an older version until they can fix their browser situation.