Ask HN: Could Microsoft restrict access to file backups via Microsoft Account?

I read many accounts of Google locking out users from their Google Accounts and providing no available recourse, so I moved to Microsoft OneDrive and an external drive backup system.

However, with the recent release of Windows 11, and the ensuing discussion around the always-online account structure required to use W11 machines, I realized that my locally-stored XLSXs, DOCXs, OneNote Notebooks, etc. are all tagged with my Microsoft Account information.

This leads me to ask: if Microsoft were to ban my account [1], could they then stop me from opening my backup files on a new machine, even if I made a new account?

[1]: I have not heard any stories of this happening to Windows users, but given the current tech landscape I don't want to take any chances.