Yes, but many ISO documents are not publicly available (they're paywalled instead, even though ISO doesn't pay the authors). The Ada rationale is publicly avail

Yes, but many ISO documents are not publicly available (they're paywalled instead, even though ISO doesn't pay the authors). The Ada rationale is publicly available, so anyone can see exactly why various decisions are made. That's useful for someone using Ada (obviously), but it's also useful for people designing any other programming language... you can often learn about a craft by learning about why people made various decisions.