Electron is moving pretty quickly (and breaking APIs) at this point so you'd end up with just as many versions of the shared library as you would copies in applications.
The very fact that we 'do not break APIs' is one of the reasons that this newsreader is 100+ MB. If Google Chrome wasn't 4,490,488 lines of code designed across years of development to, well, _support old web APIs_ -- then it would likely be much smaller. :)
Well, and, as the parent said, even with this you still can’t use the same version of the library even for a few months. That’s the worst out of both worlds.