There seems to be a renewed interest from proprietary software vendors in the use open source to create vendor lock in.
This week, add Microsoft’s Silverlight 1.1 and Dynamic Languages Runtime to the mix alongside Adobe’s Flex SDK.
Jeff Gould argues that open source has “jumped the shark,” and that:
the magical words “open source” have come to function as the software equivalent of carbon offsets. . . . some software vendors are cleverer than others, and have learned to buy indulgences for their sinful profit-craving ways by selectively building open source components into their stack. . . . Their own software remains every bit as proprietary as the Microsoft products they compete with.
Interestingly, his argument comes the same day that Microsoft announces the Dynamic Language Runtime at MIX 07.

