The tripwire is already moving, and split: Amazon shortened a subset of server lives from six years to five, taking a $677 million hit to nine‑month net income, while Meta extended from four years to 5.5 in the same period – two sophisticated operators reading the same asset’s aging in opposite directions, in their audited footnotes. GPUs are increasingly pledged as collateral and their useful lives are contested in real time, creating a forced‑seller dynamic telecom never faced.