That is also required for any kind of key rotation to work, you're getting new key for a key, because alternative of using key directly would mean re-encrypting the whole drive when it changes and of course only having single one instead of multiple
Working backups are important regardless, but if you use a TPM then you’d better have your recovery keys somewhere convenient. I’m sure you can print them out and keep them in your wallet or something.
don't worry, ms pushes users to just put data on onedrive, they will start losing data far before machines actually die. We already had plenty of stories of that mess.
