I use KeepassDX on family mobiles with Syncthing for copies between laptop and phones. What would i gain moving to Vaultwarden, knowing that i would never open my network to the outside world? It would be easier to manage for sure, as im having to setup phones and laotops myself in the family and worry that they do silly things like turn off syncthing. But what about offline access to passwords? Does Bitwarden mobile client keep a local copy of database until it can sync?
Haven’t used KeePass so can’t give a direct comparison, but to answer your question, yes as long as you don’t log out of your client bitwarden will keep a local copy until it can be synced
Important to know: the local copy is read only…so you can’t modify existing or create new entries if you aren’t connected to the server