Because your initial premise is flawed. Equal GET requests will often have different results based on the user doing them. Either because they are requesting their "own" data or because they have different privileges and see different results. While not perfect, it's the reality.
This throws out all possibilities of caching. And why intermediates should differentiate more than that I cannot see. So https is in no way limiting REST.
This throws out all possibilities of caching. And why intermediates should differentiate more than that I cannot see. So https is in no way limiting REST.