Hi John.
I give You another example.
In our industry ( kind of Software development) we are using hundreds of different "bot" machines. Automated testing, compiling, building, etc systems. Most of those are still running older versions of Windows. Because people responsible for those processes doesnt have absolute certainity, that those routines work fine after every SAC upgrade. For those systems most of end-user features and functionalities introduced with new W10 release are pointless. So, for IT is very hard to sell them idea- to screw twice per year all their systems. They have much important jobs to perform than test compatibility with next W10 release. We are trying to keep our user stations on more recent versions - it cost us lot (time resources) and end-users dont understand why it is needed. they dont see benefit, or it is tiny compared to introduced problems.