[sangnoir]

They are snooty as hell, and I'll forever associate them with The New Yorker[1]. That said, I love them too! Now, if only we could do the same for awry and other words that trip up voracious readers.

1. https://www.newyorker.com/culture/culture-desk/the-curse-of-...

[gsinclair]

They were once coming in English-language publications but now are seen in only The New Yorker, The Economist, and one other. Can anyone recall which?

[eru]

Interestingly, they seem to survive most in naïve than in words like coöperate.

Co-operate is much more common than na-ive (which I've never seen). But both cooperate and naive seem reasonably well accepted.