From Notes2Self 2006 post we discover once again that ODF Interop problems are not new. Back in early February 2005, top ranking OASIS Executive James Clark made a comment to the OASIS OpenDocument technical Committee about the lack of interoperability for spreadsheet documents:
".... I really hope I'm missing something, because, frankly, I'm speechless. You cannot be serious. You have virtually zero interoperability for spreadsheet documents. OpenDocument has the potential to be extraodinarily valuable and important standard. I urge you not to throw away a huge part of that potential by leaving such a gaping hole in your specification...".
Claus Agerskov further commented that this provided a means of creating lock-in (my emphasis)
"OpenDocument doesn't specify the formulars used in spreadsheets so every spreadsheet vendor can implement formulars in their own way without being an open standard. This way a vendor can create lock-in to their spreadsheets"
Group items tagged 
".... I really hope I'm missing something, because, frankly, I'm speechless. You cannot be serious. You have virtually zero interoperability for spreadsheet documents. OpenDocument has the potential to be extraodinarily valuable and important standard. I urge you not to throw away a huge part of that potential by leaving such a gaping hole in your specification...". Claus Agerskov further commented that this provided a means of creating lock-in (my emphasis)
"OpenDocument doesn't specify the formulars used in spreadsheets so every spreadsheet vendor can implement formulars in their own way without being an open standard. This way a vendor can create lock-in to their spreadsheets"