Last year, I bought a new top-end Dell desktop to use as a development machine.
It was delivered with Windows 8.0 - which I found to be very hard to use so I got rid of Windows 8.0 and installed Windows 7 Professional.
The retrofit took the best part of a day - even with help from Dell.
I try to minimize the time I spend on technical maintenance and on rewiring my head to adapt to new UI paradigms because I'd rather use my time for productive work. So I have not installed Windows 8.1.
I'm hoping that Windows 10 will take us back to a Windows 7-like UI but I have not spent much time looking at the details.
What's your view on this
Does Windows 8.1 have real benefits over Windows 7 and if so, what do you see and the most important ones?