I got sober (for the second time) when I was about 58. I'm 65 now and my life has never been better.
The point is to better yourself, your way of life, your health. At 63 you could have quite a few years left, so why not make the best of them. And if you keep drinking, terrible things could happen, one being that you might shorten your life.
Go for sober. It's worth it.