gosh, nevermind you're right, I just checked and on a 'recent' Linux VPS that I had spinned out and indeed they are. But they weren't on my Mac and I had never

gosh, nevermind you're right, I just checked and on a 'recent' Linux VPS that I had spinned out and indeed they are. But they weren't on my Mac and I had never noticed that detail on new machines. All of the other ones where I looked into ~/.ssh/known_hosts had plain hosts there. on a side note: it's great to know that it's supported :)