Gotta say I agree with Remko a lot here, and feel a released version of Umbraco should be in a state where it's reasonable to run any site on it, where the previous version would have been fine. Yes, the backoffice is a major achievment and yes it is cool as hell, but we are currently at a level where we could reasonable call it release candidates but it's called a release. I would expect feature parity from a new version of Umbraco when it's deemed ready for release.