>>>Which can be an advantage. I've been wasting a month battling a bug in the ARG library that got introduced in a Windows 10 update. If there are no updates there is less chance it will break something along the way.
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>>Can also be a disadvantage
>
>At that rate, he might as well stick with XP (i.e. not just himself, but all his customers as well) -- to be "immune" from updates. Obvious disadvantage of course is that you're setting yourself up for getting trapped.


That is not a valid comparison. XP is not supported anymore. Windows 7 is until 2020. We are running Windows 7, 8.1 and Windows 10 here in the company. Some of our clients upgraded from XP less than a year ago. We cannot dictate what our clients are using, but we do advise clients not to got the the lastest OS at least two years after it has been released because of the reasons given.

It is just common sense. Given the latest Windows 10 disaster, it proved the point that for enterprises it is critical to evaluate OSs throuroughly before implementing it. The stakes are too high when you're getting bitten by these kind of things.