Uh, at least in terms of react a bit of quick googling saw people who were putting effort into optimizing react's client side size getting it down to ~40 - 90 kB, so it seems pretty comparable. Some of these folks had a 1.2 MB script bundle they were sending to the client to begin with.

I'm not in the trenches with this stuff though so my numbers may be wrong but... the ~500% number seems pretty off.