Office could freely continue to support their old proprietary formats if they wanted.
In an ideal world a converter would generate E.G. a 1200 PPI render of each page, then compare it to a similar render as provided in the nearest rendition in the allowed simple new format. Those could be diffed to produce a highlight of areas that changed.
The software could then ask if the transcription from one format to the other was close enough, or if there were some corner case that wasn't good enough.
Bonus points, collect feedback if the end user is willing to submit examples.
In an ideal world a converter would generate E.G. a 1200 PPI render of each page, then compare it to a similar render as provided in the nearest rendition in the allowed simple new format. Those could be diffed to produce a highlight of areas that changed.
The software could then ask if the transcription from one format to the other was close enough, or if there were some corner case that wasn't good enough.
Bonus points, collect feedback if the end user is willing to submit examples.