It's not stack but stackage you are referring to.

Stackage puts considerable effort on the whole community to ensure that packages remain compatible, and forces package publishers (developers) to update their packages in a timely manner (otherwise the package will be dropped from the snapshot). That works in the Haskell community, but I'd be hard pressed to believe any javascript developer who has a package on npm.org would put the same amount of effort into keeping it up to date.