When you enable the PIN, you deliberately weaken your security for convenience. However, when the database unloads, your database is still protected by your pass phrase.
> However, when the database unloads, your database is still protected by your pass phrase.
This is not the case if you disable the "lock with master password on restart" option. In that case only your PIN is guarding access the the vault data.
Using a PIN shouldn't have to mean weakening the security, since there's several secure implementation options of a PIN. (See other comments about Windows Hello for example)
When you enable the PIN, you deliberately weaken your security for convenience. However, when the database unloads, your database is still protected by your pass phrase.