Coming up with a simple formula is a big security risk. It makes your passwords easier to brute force, and with enough entropy, probably easy to guess as well.
And what happens if the password is breached? Do you change the formula? What happens if a site requires a password change? Even if the formula accounts for versioning/iterating, how do you remember which iteration you’re on?
Extra security with 2FA I agree with, but that’s not mutually exclusive to using a password manager.
And are password managers really single points of failure? These password managers can sync to multiple devices, so your data is generally safe. If someone gets your password manager password, that’s a problem, yes, but they’d need access to your device to view anything, as installing on another device requires a separate master key to set it all up (which should not be stored digitally anywhere).
Coming up with a simple formula is a big security risk. It makes your passwords easier to brute force, and with enough entropy, probably easy to guess as well.
And what happens if the password is breached? Do you change the formula? What happens if a site requires a password change? Even if the formula accounts for versioning/iterating, how do you remember which iteration you’re on?
Extra security with 2FA I agree with, but that’s not mutually exclusive to using a password manager.
And are password managers really single points of failure? These password managers can sync to multiple devices, so your data is generally safe. If someone gets your password manager password, that’s a problem, yes, but they’d need access to your device to view anything, as installing on another device requires a separate master key to set it all up (which should not be stored digitally anywhere).