Thank you for the answer!

I have not previously heard Meson described as a reinvention of Cmake or a CMake clone, nor that it was meant to be. I would think that Meson being as opinionated as it is, including for example the fact that it does not and will not support user-defined functions, precludes it from being a CMake clone. It seems instead to be a build-system with a rather different philosophy and feature-set compared to Cmake. But if that philosophy or that feature-set does not match your needs, then there's obviously no reason to pick it over CMake