I enjoy self hosting, but what tipped the scales for me in favor of using Bitwarden’s servers is that I’m 100% confident I’m not as good as hardening my system from being compromised as they are. The vault is going to be encrypted anyway, and I think there’s a lower chance of it falling into the wrong hands if it’s hosted with Bitwarden. Same reason I don’t self-host email.
Plus Bitwarden is a cool company and the product is open source, and the premium features are unreasonably low priced.