Strong disagree. Collaborative editing is one of the major points but not the only one. For me and I believe many others, being able to view and edit my documents in a web browser is a huge convenience.
(Speaking of collaborative editing, OnlyOffice too supports it. [0] However, you might need to setup a standalone “document server” [1] if you’ve a lot of collaborators.)
[0] https://helpcenter.onlyoffice.com/onlyoffice-editors/onlyoff...
[1] https://docs.hetzner.com/konsoleh/storage-share/faq/addition...
It's fully FOSS. https://www.collaboraonline.com/code
> Due to performance reasons, we cannot support the built-in version of Collabora. So if you still want to use Collabora, you will need to provide your own server. You could use, for example, one of our unmanaged dedicated root servers or a Hetzner Cloud server. You can activate Collabora via the App Store, but you will need to use the other server for data processing. You as the customer are responsible for configuring this server yourself in the app's settings.
[0] https://docs.hetzner.com/konsoleh/storage-share/faq/addition...