Didn't read it but, couldn't this be a "battlefield" where LibreOffice could have unbeatable advantage?
See the SFDocuments.Calc service there. ScriptForge makes it more convenient to work with the API.
Using it with Python: https://help.libreoffice.org/latest/en-US/text/sbasic/shared...
While I wish this was not the case, the consumers of my excel spreadsheets barely have enough excel skills as is.
The idea there is any value in scrapping all that for LibreOffice is completely and utterly delusional.