Has anything changed in the last decade in the way of improvements?
I know there's "the cloud"...whoopee. But is there anything I'd really use?
Not sure, I always have the latest one due to work and its a little hard to remember back 10 years ago but...
that god awful ribbon UI that was released with 2007 is now easier to deal with, but since you have a decade worth of experience with 07 ... I am guessing that you are "good" with it lol. (imo you might as well could have stayed with the 2003 version and kept classic ui)
there's built in save to pdf... which im not sure if it was a thing back then
you can easily save documents on your "one drive" (used to be called "sky drive")
Honestly the biggest change is that the Mac version doesn't suck anymore.
and by "anymore" I mean as of 2016, up until then it was always feeling like someone's weekend project.. but 2016 really makes it feel exactly like the Windows version
2007, if I am not mistaken, is also the last version that leaked online with a no DRM/no phone home, works everywhere without a key ...
I have personally seen a 100% legal, straight from Microsoft, identical version of the 2016 for Mac but as far as I can see this one haven't leaked so far to the p2p networks (or maybe I am looking in the wrong places..)
for collaborating I still find google docs to be easier, esp with real time multi-person edits, and I always save documents I need to pass around with a checkbox that makes it compatible with past versions .. thus since you got .docx support on your office... you are still good for now