The developers were virtually 100% Mac and Linux users. I don't think there was a single developer who actually used IE for anything other than testing features before code was merged. We definitely were not going to use IE-specific features, no matter how cool they were, because almost no one could actually run IE except in a crappy VM.

Chrome is more widely used than IE.

There might be more gold on the ocean floor than all the gold we have ever mined, but we will never get that gold because its too uneconomical for us to get.

Same goes here, the 5th of the market is a non-consumer market for us. Those days are gone where every computer with a browser was a potential consumer.

At this point we have to ask the question, if you are still using IE, what business assumptions can we make about you, and are you really worth the cost spent to go after you?

Though, I will say you have not asked that last question. At least not in a meaningful. Otherwise, you would not be dominated by the larger fish in the ocean that do go after these customers.

Maybe if IE was the only browser available on Windows, but it isn't.

"Developers, developers, developers, developers." - Steve Ballmer

Also, I admit I do prefer a non-monoculture in the browser landscape.