What I mean by this is e.g. you can already use Linux on a desktop and it's generally okay (or even good sometimes), however things like LibreOffice are absolutely unusable in terms of performance, functionality and user friendliness compared to e.g. Keynote or even Pages on macOS.
Multiple governments having to solve essentially the same issue on a global scale is a unique opportunity to save costs by working on open source together, and get funding and direction that's never been available to OSS before.
Most of the time I deal with csv downloads for data, or the shit PDFs that I can only fill in with the Adobe reader on windows. I can't recall the last time I fired up OnlyOffice (better MS garbage compatibility) for anything related to work.
This doesn't mean that those tools are irrelevant, but significantly less needed, and less of a migration hurdle for many companies.