I’m hosting Vaultwarden, the obvious benefit is that you get all the Bitwarden features that Bitwarden has you paying extra. It’s also more lightweight and easier to setup than Bitwarden itself (although I’ve not tried it myself, so don’t take my word for it). Vaultwarden was very easy to get up and running, upgrades are easy as well, documentation is good and backups are easy to create and restore from. I’m very happy.