Not to take away from your excitement or the validity of the change, but non frontenders find webpack rather bloated. To be fair, I’ve met more than one front-end developer with the same perception.
Regardless it still seems to be the build system most major platforms and large orgs are choosing to integrate with (for better or worse). Which comes with its own benefits.
It might not be the best build system for a raw new js project but in terms of broad support, stability, adoption rates, 'no one ever got fired for choosing IBM', etc it seems to be the system of choice.
My point was that if you look at the changes and new features, all of it seems to me as stuff that improves core functionality, there's no feature creep.
Yay webpack because that's what I use so less work for me next time I start a new phoenix project (:
(but hey, I'm still stuck back whenever Gulp was popular, so don't take me too seriously!)