Libre Office. it can work with MSO files, but has caveats regarding the nonstandard file specs. [docx. vs doc.] you can open and work with MSO nonspec files in

Libre Office. it can work with MSO files, but has caveats regarding the nonstandard file specs. [docx. vs doc.] you can open and work with MSO nonspec files in libre office, but there is usually a note regarding format mangling due to a certain corporation breaking the file spec. Myself i have not had problems switching between the two ecosystems[MSO vs Libre] and the typical MS baggage is not attached to libre.