When the Old Man shaking his fist at the Cloud is a former tech lead of OpenStack's Compute project Nova, I think it's worth paying attention.
His fist started shaking 4 years ago, but the most recent commit on GitHub was 4 hours ago. The fist is still shaking.
And only because some readers are quick to make assumptions - here is a link to the assumptions: <a href="https://shakenfist.com/manifesto/" rel="nofollow">https://shakenfist.com/manifesto/</a>