It's a nice solution for sure, but a problem by choice. You could just have an AAAA record for the domain in addition to the A record, and as GP pointed out, resolve SSH sessions via the IPv6. If the user wants SSH to work with IPv4 for whatever reason—I see the point that there may be some web visitors without IPv6 still, but devs?—they could pay a small extra for a dedicated IPv4 address.
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It's a nice solution for sure, but a problem by choice. You could just have an AAAA record for the domain in addition to the A record, and as GP pointed out, resolve SSH sessions via the IPv6. If the user wants SSH to work with IPv4 for whatever reason—I see the point that there may be some web visitors without IPv6 still, but devs?—they could pay a small extra for a dedicated IPv4 address.