My theory (from anecdotal use) is that the OOXML complexity also explains why M365 office implementation is lacking in so many features and is just not very good at all when compared to the Google office suite.

I do have strong memories of OOXML and the scandals that were with it when it became a standard through MS allegedly buying/stacking/influencing votes:

https://chatgpt.com/share/68bf5e11-4e10-8003-ac9d-d4d10f7951...