The "maximally flat" package structure in npm 3 solves the problem in most common cases, so I suppose "much more useful" was an exaggeration - if you keep your code in a relatively short base directory such as C:\src\nodeprojects\left-pad-ng\, you'll probably be fine.

Depending on what version ranges dependencies are locked to, you could still end up with a pathological situation which breaks the path length limit, but I've only had that happen once since switching to npm 3, and it was easy to resolve.