An interesting chart appears on the Wiki explaining how Microsoft keeps tilting at this windmill and has two decades of cancelled or scaled back products to show for it.<p>I suspect there is an inherent scaling problem with the approach.  While it demos well and can be useful in a lab setting, the full scale version ends up being so complex that mere mortals aren&#x27;t able to comprehend it and end up just losing their files constantly in the morass of schemas and structured accesses.<p>The talk on the wiki about being able to write an editor that can handle any file type smells of pure insanity to me.  An application that can present a usable editing interface for any filetype would be so bloated that it&#x27;s almost inconceivable to think about a single company writing it.  Can you imagine the kind of application that has an interface for manipulating photos, writing reports, tabulating data, programming (all languages), doing CAD, editing textures, composing music, etc...?