> Just use LibreOffice at this point, at least it has native performances

I don't think you've ever used LibreOffice if you think it in any way fits the description "performant". It's a great project but I wouldn't exactly call it snappy.

I use regularly both libreoffice and collabora online and I can say the former is snappy compared to the second. It can take a longer time to open thought, mostly on Windows.