When you're releasing an open-source or off-the-shelf package, your users have a clear choice about when to upgrade. Early adopters will be on a bleeding edge version or an x.0 release. Late adopters will be several versions behind.
This choice isn't available with web sites. There is only one release version: CURRENT
Any thoughts?
This seems to be the case. Most web teams I worked in test their updates a lot before deploying on the live server(s). Some of them even do ContinuousIntegration... -- PieterVerbaarschott