Nice jab try there, the suble point you are missing is that a deployment profile still is a guarantee of support.

There aren't an endless number of profiles.

I'm not sure if you're just being disingenuous here, but you're right that you're not going to be able to use all functionality from the stdlib of Ada ( and others ) on every possible target, but you were never, ever going to. And Rust certainly won't solve this problem for you. It's not a consequence of poor standard library design either. It might not be immediately obvious, but even C has a runtime library, which needs to be specific to the architecture and OS that you're targeting. Just for a quick example, `malloc` is going to need to function differently depending on what OS you're running, and if you're targeting a microcontroller with extremely limited RAM it might not even need to be implemented at all.

I don't think the parent was claiming the Rust was better in this regard, just that it was no worse. Other languages also restrict standard library features on some platforms.