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?
Technically KeePass can “merge” and has some sort of conflict resolution, but you’re right that forgotten and unaddressed conflicts can lay around for unlimited time without you noticing. It’s the main problem with keepass + syncthing.