Re:I'm STILL not too worried (Score 1)

That's fine for your documents that you are using currently. But extrapolate this for a large company with thousands-millions of documents and the scale of the problem become apparent. Or consider the disks that I have in my small office with Multi-mate spreadsheets or even 1-2-3. Sure *I* can open them if I try hard enough, but what about everyone else in my office? Think bigger. Document-format-lock-in is a really anti-competitive practice that needs to go away.