I worked for a hosting company that use OpenStack (https://www.openstack.org/marketplace/public-clouds/). Long story short, it’s used by a lot of companies, I have been to a couple of OpenStack Summit conferences and they are thousands of people there.
However, it’s not simple, very complex to maintain, hard to troubleshoot, upgrading to a new version is a pain in the ass, the number of projects under the OpenStack foundation could be overwhelming.
Good job OT :)
I will improve my open source projects because I got a lot of feedback from people: