An interesting report on the adoption of IPv6 by the Internet at large.
Very interesting indeed! It discusses all those aspects that have slowed down IPv6 adoption.
My ISP (which also hosts our gateway system) was amongst the early adopters and I have also experimented early, but abandoned it due to the "no benefits and only problems" situation. But later, when those were mostly cured, I again enabled IPv6 on my network. Problems caused by running dual-stack are now rare, but still it does not really have any benefits. So it is understandable that it is adopted so slowly.
Unfortunately it is not only ISPs that affect it. Our beloved router manufacturer MikroTik has mostly left IPv6 as an orphan. There is an add-on package with some basic IPv6 functionality but most of the nice features available everwhere in the system are only for IPv4. This has held me back to experiment with IPv6 on our section of AMPRnet, as these routers are widely used.
Rob