But perhaps more interestingly, and certainly from a longer-term perspective, Windows Nano Server represents the future of Windows: a future where there is clean break from the necessities to support past applications and legacy code, a future where Windows can work remotely in a very lightweight, scalable, supportable way.
While Windows Nano Server is not intended to replace Windows Server 2012 R2 or Windows Server 2016 in any way, it's easy to see how there would be much less of a need for a general purpose server release in the near future, especially as legacy code gets aged out of production and use cycles and more and more workloads move to the cloud. We could see a completely different world where Windows Server gets more like Windows 10: No major revisions or major n+1 style versions, but just solid updates coming fairly regularly out of Redmond that add functionality or remove old features that have been deprecated and replaced.
While Windows Nano Server is definitely a specialty move for now, it's not hard to see how it will become the preferred operating system as time marches on, with the whole Windows Server operating system becoming an "if you must" type of option.
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