Fun opening a project page to immediately step on a LEGO brick analogy! This is a pet peeve of mine to the degree I had to write about it a little while ago: https://listed.to/@crabmusket/30495/lego-blocks-are-never-a-...

As for Polylith itself, it seems to have some fairly sensible non-controversial ideas like building atop a foundation of pure functions, building up shared libraries, separating code by component instead of layer, etc.