Great quote for Ashley
"It does not make sense for us to drop the “Preview” label because we think that our stuff is ready, when the ecosystem is not - because to our users, what matters is that their content works, and not who is responsible for making it work. This means that readiness is not entirely in our hands in this case. That said, we are talking to all major browser vendors - and we do believe that they are doing a very good job to improve this technology and to get it where we want it to be. "