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.
* Only if you dont use the many still proprietary extensions of PDF I suppose.
Anyway I’m not sure following the Adobe standard in our institutions is the smartest move.
Not solely, but since sooooo many documents are already only available in PDF, you need to support it for backwards compat alone, plus all the people who just wouldn’t migrate their data to a new format because the old one still works for them.