I spent a couple years working at an advertising/marketing agency. All but one of the artists were quite young. Me, not so much. They were enamored of gray type. I told them everyone over 40 hates it because it’s hard to read. They seemed surprised by this. Then they insisted they couldn’t use 100 percent black. My eyes told me 100 percent black was ideal, but they insisted otherwise. In another 10 years or so they’ll find out!