Microsoft (who whatever anyone says, know a thing or two about developer tools) have three "personalities". The typical corporate developer who just wants to do 9-5 (nothing wrong with that), up to the high-academic theoretician. When adding a feature to VS or whatever, they think, how will each of our personas use it?

I can't find the original article but here's a rference to it: http://www.codinghorror.com/blog/2007/11/mort-elvis-einstein...