It was like it when I graduated and also from what I'm seeing online it's still that you do get to choose for almost every college what score you submit. Unless 229fn has a specific college they really want to get into that requires all scores, which I'd double check before taking any test, I'd take both. Most people I know it was very 50/50 between SAT/ACT studying or not, because science was a larger factor in ACT some STEM people got a higher score on it without studying. It wouldn't be a loss to take both, nor take both multiple times (within financial reason for your family). I know some people who took the SAT 3-4 times.
Edit to add: It was heavily pushed in my area to take both tests and take them as many times as you can. The questions do vary so if you get a good set of questions you know, have a random good day, got good sleep, you get the idea, but you really can get a better score than you even expect. Do it within reason mentally and financially but there is no reason not to otherwise imho. If anything, since me and Laundry have such conflicting views, ask a professional at your school for their opinion and advice on the topic.