Well, power envelope IS the limit in many applications; anyone can build a LOBOS (Lots Of Boxes On Shelves) supercomputer, but data bandwidth and power will limit its usefullness and size. Everyone has a power budget. For me, it's my desk outlet capacity (1.5kW); for a hyperscaler, it's the capacity of the power plant that feeds their datacenter (1.5GW); we both cannot exceed Pmax * MIPS/W of computation.