with 21.1 major release done, xorg has killed its long lived autotools based build sytem in favor of meson in process they have been able to remove ~6000 line of code and configure speed ups with a modern build system. Meson has become delight to use over past couple of year in my personal experience too. I like cmake too but today if I were to write a new piece of software, I would certainly consider using meson before anything for its build system.
I’m never sad to see autotools go
Build systems should never be this complex!