We used to have a self-hosted Nextcloud and everyone hated the docs in it. We're a design company, with everyone on Macs, so something this ugly, clunky and hard to use [0] is never going to get traction.
Ok but that clearly competes with microsoft Office. I would assume majority of office users prefer that look and feature set.
Even google docs are not really pretty. Maybe it's opportunity to get something like Craft, Outline or Notion and thus leaving that docs requirement as part of the suite.