> it is cross platform and constructs project files for the build system of your choice. if you have people using visual studio, they can continue to use it as it will generate project files for the ide, if you have people on unix using make, it generates makefiles, i think it even supports obscure things like jam.

But these days a lot of those systems support CMake natively. E.g., Visual Studio can open CMake-based projects directly, you don't have to generate a VS project file. I'm curious as to how many people still use this capability directly; i.e., how many people use CMake to generate a platform-specific build file and then actually work with that file. I think probably the most common use for CMake is to generate a build file and then immediately build it. To probably 90% of CMake users, it would make no difference if CMake ran all the build commands itself, directly.