I forget the time frames, but you won't get far out of the 19th century undergrad in math like calculus. Statistics or stuff in Comp Sci you will but not in Calc or Differential Equations.
That's somewhat true, however the way the math is taught has changed.
Anecdottally, my father was only introduced to vectors and vector based calculations when at the uni. My generation was taught vectors in primary school already.
I think they opted for the different approach to make a more visual representation of the concepts, so younger minds could more easily grasp them.
