Been wanting to transition to a password manager for a while. I have done my reading and research, so I know all the benefits of using a password manager instead of using the same 3 passwords across all sites. One thing that still scares me is "putting all my eggs in one basket". However unlikely, if my password vault is compromised, then essentially all of my accounts are hacked. The probability of that is small (LastPass got hacked, and the attacker brute force opened my vault), but the impact is huge. This has been the main reason holding me back from using a password manager.
What if I used a password manager in conjunction with a password that is only in my head. So the actual password for my account is 2 parts, first from password manager, second coming from my head, concatenated together. The second part would be something that is common to all accounts, but not written down/stored anywhere.
the only downside I can see is that password autofill will not work, but the full password to my accounts are never stored anywhere.
Is this a better scheme? I get the benefit of complex password without reuse, and even a cracked password vault won't reveal my actual passwords.