I did at one point but have not in a while. I had it running on a VPS for a bit though. At the time I mostly used it for calendar/contacts and had added ebook reading plugins (mostly epub/cbz ) that I used from the file manager and I used some sort of integrated RSS reader.
I mostly use Jirafeau and Syncthing for moving documents and images around these days.
Ive thought about playing with it again though. However while Nextcloud and open-office both run on FreeBSD, running open-office-online on FreeBSD isn’t well supported and I havent wanted it bad enough to spin up a whole new VPS or flip a VPS yet.
But it’s something I consider from time to time and might do eventually.