Would the Office team even have had a stable enough environment to create applications as complex as Word and Excel with Metro in time for Windows 8 RTM? Would they be full recreations, or new subsets (like OneNote MX that doesn’t have all of OneNote 2013′s functionality)? Maybe more importantly, at the time Office 2013 planning was going on did anyone really think that Tablets would have as strong a focus as they do today? (They didn’t.) Or did anyone know that Windows RT wouldn’t be supporting desktop apps in general?
That’s the reason some of the built-in apps in Windows 8 are scrambling to add features now (Mail and Music, most notably). You can’t build full-featured robust apps until the underlying platform is solid.
There’s a ton of other good stuff in this post. If you’re a Microsoft watcher and you’re not reading Hal’s blog, you’re missing a lot.