One killer feature would be the ability to save Time-based One-Time Password credentials for a site. I really like how Bitwarden & 1Password have this option. You set up the pw manager as an authenticator app and then it includes a random 6-digit TOTP thing along with the username/password. Then, it will put the TOTP in the clipboard so you can paste it after the username & password are entered.
One killer feature would be the ability to save Time-based One-Time Password credentials for a site. I really like how Bitwarden & 1Password have this option. You set up the pw manager as an authenticator app and then it includes a random 6-digit TOTP thing along with the username/password. Then, it will put the TOTP in the clipboard so you can paste it after the username & password are entered.