Here are the parameters - It's a risk / benefit analysis. It's not what we do or don't like, it's what adds benefit or risk to a business.
I'm going to take the negative side - sticking with Win7 as I honestly cannot see the benefit in upgrading at present. I present my anterior aspect to the geekzone community, ready to be spanked, schooled and enlightened by those who think there is a benefit. Who knows - hopefully I'll learn something.
Risks:
1 - Security best practice says reduce / eliminate that which is not required. Metro screen and apps - hard to remove, most of them dont add benefit to a business and it adds a nother layer of securty requirements (e.g. a second IE engine, apps framework etc)
2 - The jump from windows 2000 to WinXP added a lot of network traffic into the lan. The jump from XP to Win* / 10 adds even more. most of it is of no benefit but adds cost and slows down networks.
3 - More network functionality exposed with little to no business benefit. Reduces security.
4 - Time loss / wastage: Adding links to social media does little to benefit business and a lot to adding to time wastage by employees.
5 - Metro Screen and lack of start screen / new start screen slows down multi tasking.
6 - Now more clicks to do the same tasks. The ribbon in Office has also added a gazillion clicks to our everyday lives.
7 - Subscription model / advertising. Intrusive, adds risk of information breach, time wasting, network hogging, adds security risks.
8 - Throwing away tested software nad introducing whole new code base adds in more risk in the short term - long term it is a better strategy - but not now.
9 - Tie in / buy in. options are becoming more limited with less vendor options. XP heralded the explosion of open source, innovation and diversity. windows Store, (and yes iTunes store, google store etc) reducing that innovation nad choice.
10 - Central security and control of updates, log ins, security - all your eggs in one basket. Breached once - big damage. Security belongs in house - need to know for passwords, tokens etc.