I wonder the same thing myself. Occasionally I look into these frameworks to see if they really add anything to the development of complex web applications vs. the amount of work they take to integrate them and it always heavily seems like a waste of time.
I tried Vue because someone said the Chinese like it since they can use it without npm (great firewall & such), but everyone including Evan You stresses webpack and npm!
I've been successfully rolling it as an SPA without node/npm/webpack so far, but I'm wondering when the other boot is about to drop.