1. I need a tool that can save not just password, but something more general. For example, a desktop software credential (with BitWarden, I need to open a browser or electron app to do that). Another example would be a PIN required each time I use the voice mail. Or certain PIN for my bank accounts (not the one used to login the online banking). I am aware you can save them in the note section, but it feels better when you can customize these fields. These non-password secrets used to be saved in plain text scattered around in various files on my PC. Now I have a centralized and organized access.
2. I know that with some configuration you can have self-hosted BitWarden vault. But I think KPXC + whatever_file_sync_app is simpler.
3. I actually started using KeePassXC because IT forced me so. I hated it initially, but later discovered it's actually a great tool for managing secrets in general.
4. HN Syndrome: preferring "native" app than web/electron.