The problem with metas approach to tooling from a very high level viewpoint is that they virtualize everything. They abstract all common tasks like building, testing or running by building an entirely new system that builds an abstraction layer.

Abstraction layers tend to be slow.

What they should focus on is plumbing. Take what exists and connect it in a smart way.

Take React: the idea of applying functional programming and spitting out HTML was a great idea. HTML existed before react. Then they also implemented a virtual-DOM, which was the unnecessary part.

Or react-native: rendering UIs in a functional way is great, but stuffing JavaScript into everything is not necessary.