Andrew Clay Shafer called it in 2013: https://stochasticresonance.wordpress.com/2013/11/04/opensta...

In a former life, I was frustrated by the futility of trying to be involved with the Openstack project. My next phase was to warn people away.

Now I wonder why I bothered. Years later it's apparent that I was right, but what benefit do I see from that? Better to aggressively ignore bad technology and spend effort on the stuff that looks promising.