GNU/Linux was also "risky" at some point.
This appears to be a much better system than VMware, is free as in software, and it builds upon a free software operating system with lineage that predates Linux.
I say this in the most critical way possible, as someone who has built multiple Linux-based "cloud systems", and as a GNU/Linux distribution developer: I love it!
The first time I actually saw GNU/Linux powering something in production was in 2003, when I joined CERN and they were replacing their use of Solaris, and eventually alongside Fermilabs came up with Scientific Linux in 2004.
Later at Nokia, it took them until 2006 to consider Red-Hat Linux a serious alternative to their HP-UX infrastructure.
In hindsight of course it was remarkably prescient. This from a guy at a company that was built entirely around SGI at the time.