&gt; <i>Did it?</i><p>Strictly, BOSH solved it. But BOSH was originally written for Cloud Foundry, so through the fuzzy lens of distant history it looks the same.<p>In Pivotal we upgrade our public-facing Cloud Foundry installation, Pivotal Web Services, within a day or two of a new CF release being blessed. Typically nobody ever notices. Hundreds to thousands of VMs (I don&#x27;t know how many we are running now) are upgraded to the most recent version of Cloud Foundry in a few hours and <i>nobody notices</i>.<p>Yeah. It&#x27;s solved.