Quite a lot of decades actually

I know we've been repeatedly burned by predictions that x many telephone numbers, IP addresses, kilobytes of memory, etc. will be enough to last for y zillion years, and then they suddenly run out after three weeks.  But the BBC's willingness to concede only that "IPv6 will create 340 trillion trillion trillion separate addresses, enough to satisfy demand for decades (sic) to come," seems to take conservatism too far.