Using CPF OA for your kid's local university and poly education

The biggest use of CPF OA is for housing loan and not sure how many married couples out there are consciously aware that the next biggest use of their CPF OA is to pay for their kid's local university or poly tuition fees.

Those couples taking up 30 years housing loan, are they consciously aware that the next bigger use of CPF OA is waiting for them while at the same time having their CPF Employer contribution cut upon reaching 50 years old. In another word, more use, less fund.