Today, in Lao Huang's long article about spending $500 billion to build data centers, the first thing I noticed was him mentioning the A100 GPU, which was released in 2020 and is still widely used for AI training and inference. The economic lifespan of the A100 might be extended to ten years. I remember at the end of last year, the big short sellers were most skeptical about GPU depreciation, and I even wrote a tweet discussing it. Turns out, the lifespan of GPUs is longer than most people expected.