Sure it was largely shovelware that this affected on GBA... but this just means that DS will have better shovelware, which is a Good Thing. It quite hurt games like Namco Museum that your high scores wouldn't be saved.
Yeah, that's true - almost all the good GBA games were from publishers (Nintendo, Konami, Capcom) that weren't too cheap to include save RAM. Still, for the rare exceptions (like the aforementioned Namco Museum), this definitely is a good thing.