Took my son an additional school year to become a CPA because of "Enron:" 150 classroom hours nowadays vs 120 hours pre-Ken Lay and Company.
Of the CPA exam sections, the only one he nearly failed was the new open-book ethics exam where 90% is passing (versus 74% for the other four sections).
Costs were even higher for Arthur Andersen partners. The venerable [founded 1913] AA CPA firm was defunct by 2002. That's one reason I only buy stocks audited by Big Fours