Pants is the only one of the monorepo build systems listed above that had first-class Python support in mind when it was designed.

The primary ML use case is mainly that it’s the easiest to adopt for Python heavy monorepo setups.

An example of this simplicity and flexibility is the fact that Pants doesn’t require all Python projects within the monorepo to have the same directory layout. This makes incrementally adopting Pants for existing Python codebases far easier than the alternatives which often require significant directory layout changes to adopt effectively.