We are charging extra for any custom work to allow for testing and bug resolution specific to ancient combinations, and refusing to address superficial issues at all without a full change request and appropriate payment, but we simply can't refuse to aupport XP+IE8 without telling them to take their £20,000/month elsewhere.
We do have big new potential customers on the horizon, and they are more up-to-date in that respect. Maybe if these people don't upgrade soon and we do get huge new contracts, we'll be in a position to say "your choice, upgrade or go be a problem to our competitors" come the next contract round. I hope so.
There will not be a massive XP infection on April 8th, it will come at least a few weeks after that ;)
Unfortunately many networks on many of the bases are still using IE 7 and 8, so we have to support those some of the time (project dependent).
So the truth is that Trello always stayed pretty much ahead of the IE usage curves, so that most people with IE willing to use it, simply couldn't.
I guess this is the reason why they don't have many IE users in the first place.
[1] according to W3Counters, which is the first I found with 2011 numbers readily available.
But my point that you're misreading numbers remains. You see low IE9 usage because you don't have IE users, because, in the previous years, up to 80% of them couldn't use your product.
And now you're using these numbers to back your decision that you don't need IE9. Guess what? You won't see IE adoption grow much over the next years as well.
IE users means enterprises. By dropping IE9 now, you're again running faster than them. That's perfectly fine and I'm actually jealous, I wish I could do the same. At the same time, I'm sure it has a measurable impact on the potential market of your Trello business class product.
"Beginning Tuesday, March 25, Internet Explorer (IE) 9 will be deployed to all ACES Windows computers. Not only does IE9 improve the security posture and comply with federal requirements, but it also has a new look and many new features. While there are later versions of IE available, the EUSO and HPES must do due diligence in analyzing each version from a security and compatibility perspective to ensure the protection of NASA systems. The ACES team will continue to evaluate and roll out the latest and safest versions possible."
So I had to laugh when the article stated, "Some of the browsers we supported at launch just can’t be considered modern by today’s standards. I’m talking about Internet Explorer 9 specifically."