My acrylic nails no longer break now that I quit smoking!

I'm a chronic nail biter, so I get fake acrylic nails to look more professional at work. Ever since I quit smoking 75 days ago, I never need to replace a nail that broke or fell off. And I get them filled every three weeks! I can't think of anything else it could be except no longer smoking. I've also started gardening with/without gloves, and still, no breaks!