I assumed that the hackers have the encrypted vaults. Is it known that that they have unencrypted password data?
"The threat actor was also able to copy a backup of customer vault data from the encrypted storage container which is stored in a proprietary binary format that contains both unencrypted data, such as website URLs" - https://blog.lastpass.com/2022/12/notice-of-recent-security-...
The "such as..." without enumerating everything is very ominous as well.
You should do some actual math to roughly estimate what it would take to crack a good password. Use a strong password, use a resource-intensive key derivation function, and you should feel extremely comfortable that your encrypted data will not be cracked within your lifetime.
Fortunately for me, I don't use LastPass.