The new IP version 6 address space (128 bits) only allows you to address 340 Tera-Yotta-items (3.4×1038.) I hope they aren’t limiting themselves right from the start. (The current 32 bit IPv4 addresses only allowed you to address 4 billion items. )
I am reading that there are plans to start the the addressing off by using the 48 bit Media Access Control (MAC) address found in most Network Interface Cards. That only allows you to address 281 Tera-items. And once you give a MAC address to every toaster, refrigerator, and light switch out there, those are going to be in short supply as well…
Ahh, I see they are upgrading the MAC addresses to 64 bits. That means they can uniquely address 18 Exa-toasters. That should last for my lifetime. (Famous last words)