I don't know quite what to make of this. I got used to skipping every other generation of Office, especially MS-Word, back sometime around the time of Word for Windows 2.0 (which was great) and Word for Windows 6.0 (the next version, which was not... who knows what happened to 3, 4, or 5.) But then later, Office/Word 2003 was the last good version, before they totally messed up the interface with their "ribbon bar" or whatever they called it, that made its functions impossible to find and use.
Rumor was that Microsoft had two competing teams, and while team A was releasing one version, team B was prepping the next version. Then when team B went to release their version, team A went back to development.
Given the later performance, though I don't know that it still holds. I just know that every time they make changes, I definitely want time to watch others' use of it and see what they are before I accept the upgrade.