It's been like that for a long time (not only for cloud computing, but any big IT infra). Power is everything. To a point, that you measure datacenters in megaw

It's been like that for a long time (not only for cloud computing, but any big IT infra). Power is everything. To a point, that you measure datacenters in megawatts, when you bring new HW to datacenters you most often talk about improvement in compute per watt, not absolute compute. It's not only because of the cost of power, but also because power is something that's hard to increase in an existing datacenter - you can put in new servers easily, but putting new power lines and upgrading all the infrastructure is usually just too expensive.