Just recently, my partner's PC had to be wiped because BitLocker was surprise enabled by Windows 11, and I hadn't set her PC up with an online Microsoft login, so we couldn't get the BitLocker key that we never knew we needed.

So your data is now hostage to Microsoft, and if you didn't read the full manual when setting up your partner's new Windows PC, you now lost her data. Writing about it, it feels like ransomware, except I guess we don't have to pay anything yet, other than an account that Microsoft can gather metrics from.