I have a feeling you're in the minority. I've been using computers for 35+ years and I feel like I still don't understand OK/Apply/Cancel buttons. I still click Apply before clicking OK even if I know it's unnecessary.
Plus, I don't believe Cancel reverts changes the user made if they clicked Apply already. So your suggestion would go against how the UX of OK/Apply/Cancel has historically worked.
Plus, I don't believe Cancel reverts changes the user made if they clicked Apply already. So your suggestion would go against how the UX of OK/Apply/Cancel has historically worked.