* It's UI felt dated - which I agree is not an entirely good reason to not use it, but certain stakeholders in the org that will be using it felt it wouldn't be acceptable.
* Collabera Office, which underpins their doc solution is kinda weird how it runs, everything renders on the server and then is displayed on the clients. Not mobile friendly at all.
I did really like the ecosystem though and did consider just writing the plugins I needed for it. But then that went down a rabbit hole in itself with Php which I don't have fond memories of.