LibreOffice and old Microsoft Binary file formats.

[Luke Benes]

> MS Word in the web (via onedrive)

You are comparing apples to oranges. The onedrive version is the free, crippleware version. The paid version that companies use does include the functionality to save as with the older binary formats. [1]

Until recently, my company had a group policy to save as in these MSO binary formats. LibreOffice had then and continues to have much better compatibility with these binary formats than the newer OOXML versions.

[1] https://support.office.com/en-us/article/use-compatibility-mode-to-work-with-different-versions-of-powerpoint-bc87ca23-4208-4d58-9c01-3a38a84c16e0