You're not wrong, but this:

> they only run into problems if they connect to a wifi that doesn't support IPv6

is like 99% of the problems IPv6 devices encounter.

thanks. i didn't realize it would be that bad.

at least it's a solveable problem, because it's in the customers sphere of influence, whereas getting all websites i am interested in onto IPv6 is not.

Now I'm confused. Excuse me if I paraphrase your dialogue to illustrate my confusion:

em-bee: IPV6 IoT only run into problems if X

avianlyric: X is like 99% of the problems IPv6 devices encounter.

em-bee: thanks. i didn't realize it would be that bad.

What new information did avianlyric bring? Was that not a re-statement of what came before?

the 99% :-)

only running into problems if X

implies that X is a small problem.

but 99% points out that X is a big problem.

The address space of IPv6 can certainly make things like sensor nets ubiquitous. 5G will certainly drive ipv6 more i think.

I'm familiar with at least one use case. The largest company that builds the NICs for smart meters has its own custom wireless network technology, but on top of that runs IPv6 so that it can communicate with millions of devices.