In case you haven't noticed, we are running out of IPv4 addresses. CGNAT for v4 is inevitable one way or another. That is why we have IPv6. At least with DS-lite there is only one layer of NAT, compared to full dual-stack which usually implies two layers of NAT (CPE and CG). But all that shouldn't matter that much when you have nice unobstructed end-to-end connectivity with IPv6.
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Carrier-grade NAT.
In case you haven't noticed, we are running out of IPv4 addresses. CGNAT for v4 is inevitable one way or another. That is why we have IPv6. At least with DS-lite there is only one layer of NAT, compared to full dual-stack which usually implies two layers of NAT (CPE and CG). But all that shouldn't matter that much when you have nice unobstructed end-to-end connectivity with IPv6.