Surprise!  After a couple years waiting with no ETA, Office 2016 for Mac has suddenly been released:

https://blogs.office.com/2015/07/09/office-2016-for-mac-is-here/

Apple products have less problems than Windows PCs, but occasionally issues sneak in.  Apple has released a fix for poor networking performance in their products recently:

Fix for networking issues with Yosemite