Missing: OPMNCTL after R12.2 upgrade

Occasionally I will read the title line of new articles in My Oracle Support and it will grab my attention enough that I open the article up to spend a few minutes reading it.  Note 1619645.1 was one such today because while I do not get to do a whole lot of server administration, I have had a chance to use the OPMNCTL command to start and stop services so having it go missing after an EBS R12.2 upgrade really sounds like a bad thing.  Little did I know how bad it was, because while it suggests why this happened (and is completely controllable) it also has a suggested plan for resolving the problem.  In this case, I am sure those that encounter this really wish they found it sooner.