heh, I didn't even consider this interpretation of the above; sorry about that. I meant "tools like Docker keep using it", not people. But I still don't know what you're talking about; YAML has an 83 page spec that includes pointers, and uses tons of random confusing symbols. I say "maybe it's just me" in some of these posts, but I know it's not: I've watched many of my coworkers get it wrong the first time for years and then have to be corrected. A quick common example I see in CI config all the time: If I write version: 1.10, that's a number, then I decide to move to latest so I write version: 1.10.x, that's a string. Oops, we were never using version "1.10" we were using "1.1". Everything about it is implicit and bad. Now, it's easy to say "always use quoted strings", and I agree, but then why the hell does it have bare strings in the first place? That seems like an easy enough oversight or typo to make, and it will be made.
Opting for YAML over XML/JSON/whatever doesn't make me a tool. It made life much easier for myself & my colleagues.