OK, it's not a 'deal breaker', but is a disadvantage from my side. The reasons:
- I have various sites set up and configured through IPv6 only - main reason (see # below).
- On WF I was able to have my own IPv6 IP address for my sites. Useful for differentiating my sites.
- Most of my users' traffic comes from Asia, where IPv6 adoption is fairly rapid. In China, for example IPv6-only backbones are being set up and prioritised. The IPv6 network is generally less congested (at the moment) which leads to higher download speeds for many of our users in developing countries. (Note: don't use Google's estimate of China's IPv6 traffic, as Google is blocked in China)
A bit of background for China (translated)
It's not so much a 'deal breaker' as I can just put my Opalstack behind Cloudflare, which supports IPv6. But it's not ideal.