It is something like one /48 for each second square meter of land on Earth or something in that ballpark. It definitely can be exhausted, but that is only becau

It is something like one /48 for each second square meter of land on Earth or something in that ballpark. It definitely can be exhausted, but that is only because we more or less use the last 64 bit for grouping hosts, autoconfiguration etc. which doesn't have to be the case everywhere (e.g. container hosts, where giving each container or even a container host a /80 can be more than enough).