Yeah it’s a normal model, but BitWarden is a bit special in that their original server-side implementation was enough of a pain to self-host on a small scale that an alternative implementation Vautlwarden was created. And Vaultwarden became very popular in self-hosted circles. And now many years later BitWarden offers a Lite server which scales down. I think it’s a good thing, just a bit unusual. I’m struggling to think of similar examples.

I’m sure Vaultwarden still funnels plenty of enterprise use of BitWarden, since Vaultwarden users still use official BitWarden client.