I can't speak for using it in a massive monorepo, but I started using https://please.build https://please.build for some of my personal projects recently just a

I can't speak for using it in a massive monorepo, but I started using https://please.build https://please.build for some of my personal projects recently just as an alternative to the dominant Java build systems (Ant/Maven/Gradle). It's far more straightforward to use, and incremental builds actually work reliably.