The vendor-prefixed properties being used on production sites are the fault of those who create the sites, not those who create the browsers. The purpose of the vendor-prefixes is well known: to put new capabilities into the hands of developers and designers to allow them to test different implementations without having to use non-production versions of browsers. You are welcome to use these properties however you see fit, but you don't get to complain when they go away or change implementation because they are, by definition, not standardized and in-flux. So if your site is relying on them, and you don't want to spend the time to maintain them when they change, it's your own fault.

I thought this had been to put to rest. http://searchyc.com/vendor+prefix