How would the user notice that? I don't have the feeling something is unreliable.
Similar for HN. It also does not support IPv6. From my experience it is in the 99 percentile of websites when it comes to reliability. Aka it works pretty much all the time. Better then almost every other website.
That's your experience, which just means you don't run into saturated CGNATs. For those affected ipv6 sites provide fewer connection drops.
> How would the user notice that?
Initial connections taking multiple TCP syn retries leading to an initial stall or random assets from 3rd party sites or subdomains not being loaded which can break sites in many ways.
