random memes }

Received a Microsoft Office XML document...

... and can't do a thing with it.

Right. Missed the kind-of-obvious. All those non-Microsoft applications that learned to read the old proprietary Microsoft formats are now back to square zero. Need to read a Microsoft document - in the new supposedly "open" formats from Microsoft? Since the only implementation is in Microsoft Office, you are (once again) forced into buying a Microsoft product.

Or not. I sent the unreadable document back ...