A decent toolchain of various libraries and build tools is an opportunity to avoid bigger problems and nasty, subtle bugs when you are working on large codebases. I continue to have my share of them, which tend to be in areas of the codebases I worked on that is principally jquery spaghetti or undisciplined Backbone code.

I'd rather deal with the dependency hell; that's an opportunity cost. I'd rather deal with my current toolchain than having to tell stakeholders that a particular aspect of bad code is beyond repair and needs to be replaced badly, at the cost of a large time sink.