Even from a strictly business standpoint it certainly makes sense to open-source things like the calculator, since I doubt the source contains any proprietary IP that gives it any particular competitive advantage --- and in the "basic calculator app" space, there is certainly a lot of competition.

Then again, the fact that they managed to break one of the most conceptually simple applications that comes with Windows --- for seemingly no good reason at all --- speaks volumes about the quality of MS products these days...

I'm not sure what you're trying to say. Are we supposed to consider it normal that something which used to work is now broken? I hope not, especially with something as well-defined as a calculator.

> Then again, the fact that they managed to break one of the most conceptually simple applications that comes with Windows --- for seemingly no good reason at all --- speaks volumes about the quality of MS products these days...