> Why does Xerox need an entire A block, why do Apple, BMW?
They don't, but retroactively taking away their /8s would be extremely complicated and expensive for them, not to mention that there is very little benefit from prolonging exhaustion by perhaps 1-2 years at most.
They could buy the ranges back if they really desired. The results from the Carna botnet show just how sparse the usage of the allocated ranges is. It's practically empty for the entire left upper quadrant.
They don't, but retroactively taking away their /8s would be extremely complicated and expensive for them, not to mention that there is very little benefit from prolonging exhaustion by perhaps 1-2 years at most.