The changes are trivial
The original blog post only seems to be talking about import/export functions, which I must confess (as a non-user) I didn't even know existed.
Outlook has traditionally supported importing and exporting data to and from many different file formats. Many of the formats Outlook has supported are outdated and are no longer in mainstream use. Outlook will continue to support comma-separated-value (.csv) files as well as .PST files, but other file formats are no longer supported.
This list includes:
- ACT! Contact manager files
- Word 97-2003 (.doc)
- Excel 97-2003 (.xls)
- Outlook Express archives
This may be important to some users but I suspect not to the majority.