I use it for all sorts of things. It’s got some great features that other WebDAV servers are lacking:
S3 support, so you can use a cloud service as the backend.
Encryption at rest, so you can keep your data private, even when it’s stored on S3.
File deduplication, so you can throw the same files in over and over and not use up more disk space.
PAM authentication, so you can let system users manage their own files.
.htpasswd authentication, so it works with other web servers.
A simple web interface, so you can manage files in your browser (and it should work on all browsers, even absolutely ancient ones).
It’s incredibly fast compared to most other WebDAV servers, too.
I use it to manage my Jellyfin libraries, as a personal cloud storage, and as a deduplicating backup server. It works well through a reverse proxy too, so I have multiple instances running on my server with different configs.
There’s also a desktop app that uses the same server under the hood to let you transfer and manage files across your network:
It’s faster and has a different feature set. Also it’s written in Node.js, not PHP, so I can integrate it into my Node.js apps.
Neither of the servers you mentioned can work on a flat file system folder, so managing my Jellyfin media wouldn’t even be possible with either of them.
Neither supports file deduplication, encryption at rest, PAM authentication, or .htpasswd authentication.
Both require a database and can only be managed through their web interfaces.
Both of their web interfaces require modern browsers, so wouldn’t be supported on something like a terminal based browser.
Oh, I didn’t answer your encryption question. It doesn’t support both deduplication and encryption at the same time. You can enable them both, but it won’t deduplicate.
I’m going to add support for CardDAV, that way you can use it to sync your contacts. I’m currently working on the Access Control Protocol extension to WebDAV, which is required for CardDAV.
I’d like to eventually support CalDAV too, but that’s harder than CardDAV.
I’d like to also create another web interface with a more modern feature set for use in newer browsers, and even have file share links.
An idea I’ve been floating is creating a way to use .md files and .html templates to create a sort of blog, website, or notebook. Something that would be really easy to manage. Basically throw it up on a server, put some .md files in, and you’ve got a basic website. I’d like to use it to take notes, since editing markdown on a WebDAV share is super simple, and having searchable notes from that would mean I could drop Google Keep.
There is no obvious way to install Hoarder on an unsupported platform. My servers run OpenBSD and OmniOS. Both of them don't even have any Docker support. (Which is not something I'd absolutely need, to be honest.)
Hoarder runs on Node.js. I will use Lisp (edit: or Rust, but I'm positive I'll beat Lisp's session management some time soon). Node.js is a dependency hell.
Hoarder does not really encourage manual and/or regex-based tagging, it strongly suggests relying on "artificial intelligence". As I am rather disappointed by what "artificial intelligence" is currently able to do, I'd prefer to default to the old approach.
Of course, all of this is just a personal preference.
It's more or less abandoned, isn't it? Or has the community support picked up? The team left the company for cloudflare years ago and I would dare to say the tech stack itself is deprecated once docker became so widespread.