I suspect, if they do, they will just make it harder to enable but never remove it. As soon as you do remove it, someone will complain their page does not work

I suspect, if they do, they will just make it harder to enable but never remove it. As soon as you do remove it, someone will complain their page does not work on a customer site but works fine on their engineers version. It will be one of two things: 1) a configuration issue that is not obvious like they are pulling their css from somewhere ganky, or 2) the browser code uses a different version (debugger based) for some functionality. End result, why pull it out if it does not cause harm?