I don't want to build on a codebase that needs 5 extensions out of the box to be sane. I want to build on a platform where far more than 5 extensions are neede

I don't want to build on a codebase that needs 5 extensions out of the box to be sane. I want to build on a platform where far more than 5 extensions are needed to be sane -- I want the vast majority of my "core" functionality to be provided by an extension. Far too often "Batteries included" means "Batteries soldered in with a thick layer of epoxy on top".