"Microsoft has been pretty open for years"
For very small values of "open".
"We have learned that documents and data have lifetimes that span well beyond the lifetimes of any applications used to produce them."
No shit. I knew that already back when Windows was still at version 1. I still have some old data laying around on my hard drive that I originally created on a 48k Spectrum, for God's sake. Some of it is even vaguely important to me, enough so that it's been migrated through another half dozen computers running an assortment of operating systems, and got converted into something readable on the newer systems when that became possible.
What took Microsoft so long to figure out this blazingly obvious fact?
"All in all, it's funny to see how slowly a company like Microsoft moves."
Nothing new here though. Microsoft have a long history of nearly missing the boat on new developments, only to throw vast reserves of man-hours and money into playing catch-up. Last time it was the Internet that caught them fiddling with their todgers. This time, apparently, it's interoperability with the competition.