>ALL your services accessible through the tunnel are "down" for your users
Not all.
I operate site with IPv6 only origins behind cloudflare.
During the outage I manged to login to the dashboard after some time and remove cloudflare for nearly 2 hours, and traffic level stayed close to 50% during the IPv6 only period.
Nobody complained: those who did not have working IPv6 probably blamed it on cloudflare.
> traffic level stayed close to 50% during the IPv6 only period.
> Nobody complained: those who did not have working IPv6 probably blamed it on cloudflare.
You described a situation where the outage resulted in 50% of your customers were unable to reach you and you were unable to do anything about it. I don’t think this story is a win for IPv6, regardless of whether your customers blame CloudFlare or not.