[deckard1]

Incompatible libs, you say? Try this one on: once upon a time a handful of years ago a package-lock.json I worked on drifted so far from package.json that you could not remove package-lock.json and rebuild purely from package.json. The versions specified in the package.json were incompatible with each other, but the package-lock.json had somehow locked itself to a certain permutation of versions that it somehow just worked.

I always shudder to think that different versions of packages live in node_modules and one library produces an object that somehow makes it to the other version of the library and... I'd rather not think of all these implications or I would go crazy.