This actually uses nextcloud for its "File Storage" component. It's not a from-scratch system but a bunch of existing pieces of software all packaged together.
I think this can work well but it really really depends on if the components are chosen well and integrated with each other well.
For people looking for community edition and how it can by used by anyone, here [1] you can find it
[1] https://gitlab.opencode.de/bmi/opendesk/deployment/opendesk
A public demo or some screenshots would go a long way, imo. Even finding the comunity editiion took me a minute...
how does it compare with nextcloud?
This actually uses nextcloud for its "File Storage" component. It's not a from-scratch system but a bunch of existing pieces of software all packaged together.
I think this can work well but it really really depends on if the components are chosen well and integrated with each other well.