There's absolutely no reason why everyone who wants one shouldn't have a static block of IP(v6) addresses. If they're hard to get, that's an ISP problem rather than anything else.

Most mobile providers don't offer IPv6

I think it's the opposite. Mobile operators have higher IPv6 adoption.

Apparently Tor hidden services works well for this- there's a mode where the hidden service authenticates clients, so you even get some security for free.

The Internet of Onion Things: https://github.com/n8fr8/talks/blob/master/onion_things/Inte...

More resources on the Tor Blog: https://blog.torproject.org/blog/quick-simple-guide-tor-and-...

We have IPv6, everyone has practically infinite amount of public (and hopefully static, unless ISP did a major fuck up) IP addresses these days.

>ISP did a major fuck up

With Orange (French ISP) the IPv6 is dynamic. You have to pay a monthly fee to get a static.

Easy enough to set up duckdns etc, depends how you define cloud service, does that including renting a VM?

You need one cloud service to tell you what your dynamic IP is, but we've had that service since at least 2001.

use an overlay network like i2p or cjdns. problem solved