It's not only the years of work (and accomplishment) you'd throw away--the greater risk is whether you'd be able to pick up your recovery anywhere nearwhere you'd left off.
We tend, instead, to resume the addiction, not thr recovery. You're have to repeat all the physical and mental agonies of withdrawing, being "dry" and starting sobriety from scratch. Physically, some die from that attempt. Others prefer suicide.
I dont think I could quit twice. I know I had only ONE "stop smoking!" in me. So I'm clean, and alive. A good choice, so far.