I haven't used any of them in ages, I know Collabora is focused on their online suite. Looking at OnlyOffice's website, they are positioning themselves as an "AI-first" office suite (the LLM tools have been changed to be optional and installed separately since a recent update, but still a bad look)

And WPS Office was always owned by a Chinese company and continues to be closed-source, so no changes there. Again, the same sort of "AI-first" stuff on their homepage, yikes