A close source told me only half joking that at Google, when you start any new service, you‘ve got the choice between about a dozen backing services, of which half are deprecated and the other half are not officially supported yet...
The actual proverb, by an engineer (Paul C), is "there are two ways of doing things at Google: the deprecated one, and the one that doesn't work yet". Usually the deprecation occurred when a service outlived the original requirements and was no longer a great fit or not very usable. A good example were Babysitter and GWQ, which were eventually obsoleted by Borg.