<i>The Danger team did built a great system for its time and by the time Microsoft took over, it went downhill fast.</i><p>Microsoft managed one of the biggest cloud computing screw ups in history to date: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;2009_Sidekick_data_loss" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;2009_Sidekick_data_loss</a><p><i>The incident caused a public loss of confidence in the concept of cloud computing, which had been plagued by a series of outages and data losses in 2009. It also was problematic for Microsoft, which at the time was trying to convince corporate clients to use its cloud computing services, such as Azure and My Phone.</i><p>I&#x27;ve heard good things about Oracle&#x27;s RAC, but it&#x27;s understandably intolerant of your screwing up its disks (SAN mis&#x2F;re-configuring) when you aren&#x27;t properly maintaining backups.  I also heard the consultants you have to hire after you manage such a feat are expensive.