The Windows Phone Developer Tools, consisting of Visual Studio Express for Windows Phone and Expression Blend 4 for Windows Phone have been downloaded over 1.5 million times.
So basically there have been about as many downloads of the developers tools as there have been phones shipped?
And probably dramatically more than have sold. Though some have questioned it I still think the Windows Phone Facebook App is a good indicator of how many phones have been sold.
It's true that you don't have to install that app to use Windows Phone 7. But Facebook is pretty integral to the Windows Phone 7 experience so the Facebook App's growth is a good indicator of how well Windows Phone 7 is doing. On January 26th there were 366,000 users. Today it's 549,042.
I was at a conference last week with 100 developers, at least 50 of which use mostly Microsoft development tools. A speaker from Microsoft asked who had a Windows Phone 7 device. He was the only one. Even gadget nuts like me that carry multiple devices didn't have one.
I know about 6 people that have them, but they're all either Microsoft employees, Microsoft MVPs, or are married to one.
This, to me, is the problem. I didn't expect Windows Phone 7 to win over Android or iPhone developers. But if you are a Microsoft developer it's hard to start developing for Android or the iPhone. Because you have to use a different language, different tools, a different environment, etc...
Given that I expected Microsoft developers to jump at Windows Phone 7 because it was an easy way for them to translate their skills to a mobile platform. But as someone who knows a lot of MS developers they all seem pretty apathetic. More than anything else that makes me doubt the platform's long term future.
It's a vicious cycle. If I felt that the platform had a future, I would devote some of my .NET abilities towards developing for it. But I don't, so I don't bother.
Just like with the Zune, Microsoft came too late to the party with a reasonably good product that no one cared about.
I noted the "[developer] tools were free, would always be free" line. Why does Apple charge $99/yr? Seems like it might be a quality filter. Certainly doesn't stop the fart apps, but it seems like a nice indicator of "I'm serious about this." Or maybe it helps cover hosting charges of the free apps? Just greediness?
So basically there have been about as many downloads of the developers tools as there have been phones shipped?