> How much has that fractal expanded?
In terms of actually useful mathematics, not much. But, that’s missing the point. 100 years ago people studied chess as hard as they could, without machine assistance they didn’t become as skilled but that doesn’t mean chess somehow became more or less complex. Lawyers are dealing with roughly equivalent legal systems, and so it goes.
Mathematicians may have discovered say more digits of pi through useful tools, but at the core mathematicians are about as intelligent and still working just as hard. We have more mathematicians today in large part because global population has increased 4x in the last hundred years. However, go back 100 years and most people didn’t understand what hyper specialized work was being done.