If they are not needed for core functionally, why are they part of the standard? It's not just IT departments not able to grok v6 that's the problem, IPv6 imple

If they are not needed for core functionally, why are they part of the standard? It's not just IT departments not able to grok v6 that's the problem, IPv6 implementations are a total crapshoot in terms of quality. Some are great, a small few are terrible or straight up don't work at all, and way too many perform perfectly in common situations but blow up in an uncommon edge case. A significant number of devices (especially in industrial, healthcare and scientific fields) still don't support it at all. This both is caused by and perpetuates lack of adoption on the user side. Reduction in scope and complexity makes it easier to implement high quality IPv6 stacks. We also need more high-quality reference implementations available for newer and underserved platforms, but that's a different subject.