[inigyou]

How many /24s does your organisation have? With IPv6, one block is almost always sufficient.

[ErroneousBosh]

It's mental that my fairly techy-orientated but otherwise pretty standard UK ISP provides me with a /48 as default.

So I have 1.2 million million million million IPv6 addresses available.

That ought to be enough, eh?

[kemotep]

Of course, we could hand all 8 billion people on the planet a thousand /48’s each and still have trillions and trillions to spare.

[inigyou]

Realistically, allocation is more complicated than that, and there are arguments that the current allocation scheme isn't futureproof enough. But if that happens, there's enough room to change it and still keep all existing allocations working.