What does this prove? Demand is inflated in a bubble. If the AI company valuation bubble pops, demand for obsolete GPUs will evaporate.
The article you're linking here doesn't say what percentage of those 9-year-old GPUs already failed, nor does it say when they were first deployed, so it's hard to draw conclusions. In fact their math doesn't seem to consider failure at all, which is highly suspicious.
In another subthread, you pointed to the top comment here about a 5-year MTBF as supposedly contradicting the original article's thesis about depreciation. 5 years is obviously less than the 9 years here, so clearly something doesn't add up. (Besides, a 5-year MTBF is rather poor to begin with, and there isn't normally a correlation between depreciation and MTBF. So this is not a smoking gun which contradicts anything in Tim Bray's original article.)
