Windows 10 Pro users can now 'sidegrade' to Windows 10 S easily

[Windows Central]

Microsoft has released a new Windows 10 S installer that allows Windows 10 Pro users to sidegrade to Microsoft's new Windows 10 edition.
If you're interested in Windows 10 S but don't have a dedicated Windows 10 S device on hand, Microsoft is making it easier for you to try out the latest edition of Windows 10 on your already existing hardware. If you've got a device running Windows 10 Pro, you can now use Microsoft's Windows 10 S upgrade tool to switch to S from Pro.

Full story from the WindowsCentral blog...

 

[LuxuryTouringZone]

I'd personally never do that.