This update seems to have made things worse on my MacBook Pro. I swapped the hard drive for a larger one which supports SATA 3 Gbps. Now, I am getting random freezes which look like they are caused by errors in talking to the drive. It sounds like the problems with SATA 3 Gbps which caused them to originally disable it are really there. Multiple people on the Apple forum have a similar problem.

Unfortunately, there is no way to revert to the old firmware. Or set the controller to the slower speed. And setting the speed on the drive requires Windows.

They did write a new OS with the technology from BeOS. Palm OS 6, aka Cobalt, was a failure when released five years ago. No devices were ever released that used it. Part of the problem was the split between Palm and PalmSource. Palm went with Palm OS 5.4 for the Treo 650. And started using Windows Mobile about the same time. There were rumors that it was hard to write drivers for Cobalt.

You can have a LAN with public addresses. The only difference is that instead of having a NAT box that translates between your local private addresses to public addresses, you just have a router that routes. NAT is required with IPv4 because most ISPs only hand out single public IP addresses. To have a local network, you need to use NAT. With IPv6, the standard assignment is a /64 subnet. That means you can have effectively unlimited public addresses on the local network.

It is because there are bugs in OSes and applications that will use the IPv6 address even when there isn't a good IPv6 connection. One cause is OSes automatically giving interfaces link-local addresses without wider IPv6 connectivity. This either leads to no connectivity when using the IPv6 or a long delay until it falls back to IPv4 address.