The Foundation sees this as a contradiction to the EU’s own interoperability goals. Although XLSX is standardized as OOXML according to ISO/IEC 29500, Microsoft’s implementations often deviate from the specifications. Furthermore, features often change undocumented, which complicates compatibility with open-source software such as LibreOffice.
It’s like noticing a car crash and looking back… you know you shouldn’t and yet it’s somehow mesmerizing. So… where can I actually read about this please?