Stone Knives and Bear Skins

If you look at the software tooling landscape, you see that the majority of developers work with either open-source tools; or tools from the recently reformed home of proprietary software, Microsoft, which has figured out that its Visual Studio Code system is a good way to sucker people into working with its platforms; or finally Apple, whose tools are meant only for its platform. In specialized markets, such as deeply embedded, military, and aerospace, there are proprietary tools that are often far worse than their open-source cousins, because the market for such tools is small but lucrative.