Self-hosting services usually entails more technical knowledge than just installing an app and I don't think a document management system would necessarily work well as a native application. For starters, there's the backup issue and you wouldn't want non-technical people to store important documents that only live on a local drive. Remote web access is also a very useful feature for when travelling and that wouldn't be easy to setup for a local install.

I've been using it for over a year and am very happy with it, though I intend on moving it from my home Pi docker swarm onto a free Oracle cloud instance to improve the performance and uptime (I've got my Pis auto updating and rebooting, so services get shunted around fairly often).