Routers without IPv6 support should be considered defective at this point.

IPv4 is getting worse and worse every day with more and more CGNAT or increased hosting costs by web developers for serving clients stuck behind ipv4. It's time that IPv4 is officially deprecated similar to how TLS <1.2 was in 2020. Routers with IPv4 only firmware should be flagged as vulnerable and be recalled or require having mandatory firmware updates. Only having 46% IPV6 is no longer acceptable, we need to bring it to almost 100% with co-ordinated action instead of having ad-hoc roll outs like we are doing now.