It would have been interesting to be able to setup your own stack links (e.g. by collecting Error().stack, and being able to update this at any other point - Error.setStack?). A heap of 3rd party promise/observer/animation/etc libraries could use such a feature to ease debugging. The current implementation does not allow for this [1].

[1] https://code.google.com/p/chromium/issues/detail?id=272416