[wymy]

I think it has more to do with fragmentation.

While it's great, in theory, to have broad skills in many different languages and technologies, it is difficult to be an expert in any of of them without working with them for a significant amount of time.

When I start a new project I'm looking to leverage my expertise in my areas of focus rather than trying to find the perfect technology fit. Without significant knowledge in all options, I may not even be qualified to provide a reasonable evaluation.