Microsoft is having azure run 6-year-old technology to save 3.7 billion dollars!

Interested to hear more about this, from Microsoft’s July 22 Q4 10K

In July 2022, we completed an assessment of the useful lives of our server and network equipment. Due to investments in software that increased efficiencies in how we operate our server and network equipment, as well as advances in technology, we determined we should increase the estimated useful lives of both server and network equipment from four years to six years. This change in accounting estimate will be effective beginning fiscal year 2023. Based on the carrying amount of server and network equipment included in property and equipment, net as of June 30, 2022, it is estimated this change will increase our fiscal year 2023 operating income by $3.7 billion. We had previously increased the estimated useful lives of both server and network equipment in July 2020.