The "what is truly open source" argument could go on for days. The real issue is the fact that Flash is unstable and outdated. It crashes browsers, it ignores web standards, and it isn't made for touch screens. Why should apple support it?

I really don't think any of this is because Microsoft wants to support anything open-source. Everything that Microsoft does is calculated to benefit Microsoft and only Microsoft. The only reason they have done this is to push their own Silverlight product.