Hosting IMDS on the host side is pretty much the only reasonable way to provide stability guarantees. It should still work even if the network is having issues.
That being said, IMDS on AWS is a dead simple key-value storage. A competent developer should be able to write it in a memory-safe language in a way that can't be easily exploited.
That being said, IMDS on AWS is a dead simple key-value storage. A competent developer should be able to write it in a memory-safe language in a way that can't be easily exploited.