What do you mean linked to Microsoft? And if your TPM, the hardware device that stores keys, is pwned, the whole exercise is meaningless anyways
That's why the whole excercise is meaningless if you leave the keys on the device, and why you should put them on external hardware TPMs or key vaults. Even a YubiKey is better.
Now you just need a system that supports reading keys from such a device during boot.
The TPM is a PKI device, nothing more. It cannot take over your computer.
Their encryption by definition, is already backdoored to MS. Game over.
And that's nothing about the stupidity of the TPM itself.
This statement is misleading. When setting up bitlocker, you have the option of saving your recovery key to onedrive. It's not mandatory or even the default choice.