Before the AI craze, there were plans to allow guests to cleave off an AWS-managed enclave and expose IMDS to only that enclave [0]. No creds would ever be visible to the guest. The enclave would function as a signing oracle. The exact interface was being bikeshod before the project was shelved in the name of geNAi lEaDeRsHiP.

[0] 86a7b126fea03dd57e6a3c9c9b7951b5318d33029cef0547ff441862174682f5 is the sha256 of the shelved project’s name

Right, I've got 19 years of NDAs so I try to be careful about what I talk about publicly...