FPS question

Would there be any advantage to adjusting max FPS based on actual FPS. Meaning on slower devices that only get about 30 FPS, lower the max FPS to 30 FPS.

lol, I remember asking for this. I remember others asking for this and me voting for it.

I really would seriously love to set the fps limit lower so that the dt is more accurate to fps limit; and that I can have more logic time without impacting the fps.

Hopefully this would fix the internal dt math for various behaviours.

I was just thinking if you made a game for the Ouya and You knew that it runs good at 30 FPS. Why not just make the max FPS 30 FPS. And then the big question, is there any real benefit to doing this?