That's patently false, and your example is a straw man. Sure your grade school arithmetic hasn't increased much, but I'd assure you university maths have.

As far as EE goes, I mean sure macro-electronic theory is pretty much the same, but micro-electronics didn't even exist 100 years ago. This is now a standard required class. Digital signal processing again, didn't even exist 100 years ago, now we teach it to sophomores. The foundations that were the same have persisted and the field has done nothing but expand; this trend is replicated across most disciplines.

The data doesn't support your assessment of declining analytical skills. The ability for abstract thought has been monotonically increasing for the past 100 years.[0] I understand the appeal, oh kids these days aren't disrupting anything, my job is safe. The issue is, there's not much data to support the platitude. Globalization means you're competing with billions more people, education achievement has to increase to match; or be left behind.

https://www.ted.com/talks/james_flynn_why_our_iq_levels_are_...