I don't know about you, but I have learned a great deal!
I've mostly learned that Eurocrats can't actually write useful regulation. Blah blah blah human rights blah blah reasonable measures. Next chapter. Blah blah envisage blah blah reasonable measures. Blah blah blah inter-government communications protocols blah blah codes of conduct.
What's a reasonable measure? How do I know if I'm compliant? How do I know if a vendor is compliant?
GDPR is a wonderful, incredible, essential document for laying out human rights for the digital world. It's also terrible and incomprehensible regulation.