Sure, there is an option for a no-JS version of Gmail, but the default definitely uses Gmail, because the user experience is much better - I think that's pretty

Sure, there is an option for a no-JS version of Gmail, but the default definitely uses Gmail, because the user experience is much better - I think that's pretty clear. I agree doing some work on the server can also make sense, and that the new pre-rendered JS is an extension of progressive rendering which is not a new technique. It's a new way of doing it, though.