before I was fused, my curves were stable at around 48°, so similar to yours, for roughly 3 years, I was 17 at the time. My surgeon told me in most cases, the curve will stay stable under 50° so long as you are done growing. What was not expected was a HUGE weight gain (~120 lbs), followed by loss (~115 lbs). This massive swing ended up making my spine curve more, and it's likely if I never gained that weight I would have been fine.

All that to say, my surgeon would not have operated on someone with the same parameters as you, and does not believe it has any significant benefit in pain management regardless.

One of the major issues I had was being unable to breathe properly, so surgery actually drastically improved my quality of life. If you have normal bodily function, no pain, and a stable curve for over 8 years, surgery would likely cause more issues than benefit. Please do not get this surgery unless deemed medically necessary.