Of course. I certainly wasn't arguing cause there.
But you said that in your husband's experience people's scores didn't go up with multiple testings, and I am one data point that demonstrates that scores *can* go up the more you take it.
The only leveling off for me came between the PSAT and the last time I took the SAT. Every other time I took it, my score went up 50-100 points or so. The PSAT was my peak, and my scores dropped 50 points or so the next (and last) time I took the SAT. Even so, that last time I took the SAT, my score was still higher then the previous time I took the SAT by 50-100 points. (I just did really well on the PSAT.)
As I said, <shrug>. I'm not suggesting everyone has to take it lots of times. I definitely don't think that's necessary. But I do think that taking the SAT multiple times helped me to do better, and I certainly don't think people should be discouraged from taking it more than once if they want to. Aside from the money and the time, I don't think there's a downside. It was good practice for me, the above-level testing helped my parents to see where I was operating, and I thought it was kind of fun.
To each his/her own.