Red Hat's policy in regards of support packstack utility features allowing to perform production deployments

                                                It's hard to know what the right thing is.
                                                Once you know it's hard not to do it.
                                                   Harry Fertig (Kingsley,The Confession film 1999) 

 

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I believe that in meantime RH actually forces people

shoot a gun on sparrows

presuming that customers ( RDO community members ) are not responsible

to decide on their own when switching to TripleO ( TripleO QuickStart ) really providing huge benefits like PCS/Corosync HA Controller's cluster , automated deployment of Ceph cluster Nodes via invoking python-tripleoclient (in turn performing overcloud's Heat Stack deployment on undercloud node as was pre-required)  does make sense and when simple Controller+N*Compute+ Storage Cluster might be painlessly deployed by packstack(considering the
last task mentioned as task out of scope) with no IPMI requirements for boxes on landscape.

Per https://en.wikipedia.org/wiki/Intelligent_Platform_Management_Interface 

The Intelligent Platform Management Interface (IPMI) is a set of computer interface specifications for an autonomous computer subsystem that provides management and monitoring capabilities independently of the host system's CPU, firmware (BIOS or UEFI) and operating system. IPMI defines a set of interfaces used by system administrators for out-of-band management of computer systems and monitoring of their operation. For example, IPMI provides a way to manage a computer that may be powered off or otherwise unresponsive by using a network connection to the hardware rather than to an operating system or login shell.

References
1.  TripleO Installer, Production Ready?