[yonz]

> extraordinary claim that ISPs are supplying routers with such a dangerous default configuration requires evidence

Its a legitimate expectation and potentially the norm to expect that I can ssh to my desktop with IPv6 w/o configuring my router.

The pitfall comes as a side effect of NAT inadvertently making port access rare.

I am looking for data, inbound blocked ipv6 seems unlikely but I only have anecdotal evidence.

[jiggawatts]

That's not even an anecdote. You are literally just assuming something is true, then arguing vocally with people giving you evidence to the contrary.