Why I now plan for extra days just for cooling my glass work

A while back, I had a big commission piece that needed perfect annealing. I set the kiln to cool over five days, and I just had to sit and wait. At first, I was itching to check on it, but I forced myself to trust the process. Every day, I'd peek through the little window, seeing the glow fade slowly. By the end, when I opened it, the glass was crystal clear and stress-free. That taught me that rushing ruins the work. Now I always plan for extra cooling time. What's the longest you've waited for a piece to be ready?