re: staying on Mavericks
For what it's worth? I just attended a conference the other day where a couple of Microsoft reps. were present and discussing product licensing.
The big "takeaway" was that Microsoft is *very* interested in leveraging their "Azure" cloud platform in the years to come as THE way you'll use their products.
For example, in the future, they'd like to do away with the concept of people buying a copy of "Windows Server" to install on a PC. Instead, you'll just pay a fee to spin one up in the cloud, using your current Azure subscription, and run it that way.
By the same token, the Office 365 thing is just a stepping stone on the path to selling the Office suite as a subscription service. This is likely the last time you'll be able to pay for a "stand alone" Office product from Microsoft. In the future, they'd like to only sell it as an evolving code-base that receives frequent updates, and which you use and stay current on by keeping a current Office 365 subscription.
With Microsoft having that mindset, it's no surprise they'd be fairly picky about you having to run only the latest version of OS X to install this release of Office. (Clearly, they DO think you should be regularly upgrading the OS and apps you use, and if not -- you can just stick with the old, outdated stuff. Because to them, the future is software as a subscription and a lot of things that will run in the cloud, so will be platform independent/neutral anyway.)
It works just fine, and is less than 2 years old. There are no useful features for me in Yosemite. On the contrary, there are UI/UX changes I find unappealing. Not everybody needs a new look-and-feel experience every d****d year.
I need to use Office for work, and am using Office 2010 in a Win7 VM at present. It would have been nice to dump the VM and upgrade Office. Guess not. 🙁