Yggdrasil(https://yggdrasil-network.github.io/) provides end-to-end encrypted IPv6 routing between all network participants and is getting popular these days with thousands of peers. I've set up several devices with easy access from any places with the similar 20x.xxx... IPv6 space.
I wonder if Dyn would support it some day in the near future to support self-hosted services at home lab. It'd be great if I can dynamically resolve my home server(mail, web, etc.) via Dyn, and technically I think it's an easy thing for you guys to figure out how to integrate.