In the case of IPv6 I disagree. Every system administrator should have someone constantly pestering them about it 24/7. It's very important to the future of the Internet that it gets rolled out, otherwise we end up with a fundamentally asymmetrical Internet where endpoint devices are incapable of forming direct links with other endpoint devices. (Yes you can NAT hole punch but that is never going to be reliable without enough address space to fully connect the graph.)

Google is one of the worst offenders when it comes to dragging their butt on IPv6. Their cloud offerings have zero support, and some of their default Linux cloud images ship with IPv6 disabled in the kernel so that even if you run network virtualization software you don't get it. Much of their front-facing stuff supports it, but users can't actually use it for anything.

Microsoft comes next. Azure has no IPv6 to speak of.

Amazon is finally rolling it out. "Second tier" VPSes like Digital Ocean, Linode, and Vultr have had it for aeons.