But why not the Internet?

The reason is that it’s the most aggravating place in the world to write commercial software for.

You have, off the top of my head, 4 major web browsers to deal with across at least two operating systems.

Each of these scenarios requires its own set of tests, and each browser will behave slightly differently depending on what OS it’s running on and what browser version it is running.

And then there’s mobile.

Translation: I work at Microsoft and all this pesky choice, and the lack of the monoculture I'm used to, is scaring me.