The lifetime of a web request, for example, can be measured in milliseconds.
It is now possible, technically anyway, for operating systems to boot, service the request and disappear.
There needs to be pricing models that reflect computing models like this.
This was already possible even with a 2 second boot time. The problem is that it's a stupid use case because (unless the OS boots up in <10ms) the latency of waiting for the bootup is intolerable in any use case where a 2 second boot time was intolerable.