HIView was up to date and documented, and there were WWDC sessions teaching developers why they should move to HIView and how to do it. Likewise, Apple provided documentation about how to port your Carbon application to 64 bit Carbon. Maxon reportedly even had a 64bit Carbon version of Cinema 4D ready to ship when Apple suddenly announced that they would abandon 64bit Carbon - telling developers to disregard the 64bit Carbon they were still shipping in betas.