Eh? I have apps that are almost 10yo on Google App Engine. Even when they forced a complete migration from the Master&#x2F;Slave datastore to the High Replication Datastore, it was a pushbutton process that required minimal intervention. Honestly if I have any complaint it&#x27;s that they don&#x27;t force change faster.<p>On the other hand, Facebook&#x27;s API changes at a pretty rapid pace and there are few apps older than a couple years that have survived without significant code changes. I&#x27;ve seen API changes that are basically &quot;rewrite your whole app&quot;.