As previously stated, I think that everyone [in our community] is able to get IPv6. So this is not about promoting communication failures, but switching over to a protocol from which we all benefit.
In my experience, if you make people jump through hoops, you don't get any buy-in. Yes, they may be able to figure out how to set up a tunnel to access your service, but they will never do anything to support IPv6 in their own products or services.
I don't know where to put it, but there may be a benefit for a list that lists known internet services that do not (or poorly) support IPv6 and with replacements that do support them.
You have a point and it has actually been started about a year ago:
https://redmine.ungleich.ch/projects/ipv6/wiki/IPv6_Hardware_Compatibility_L... t
What I meant was services: - what to use instead of github (probably gitlab) - what to use instead of zoom (maybe jitsi, but does jitsi scale?) - and where this discussion started, what to use instead of eventbrite.nl