Integrate these features! They know it's what we want. Why do they keep teasing?
Because if functionality is being lost, they're not going to make it the default. Rather, they provide documentation, and leave the decision to those who can say for certain that they don't need those things.
I'm most certain that having an SSD would make any OS boot fast. However SSDs are still a new technology (questionable reliability) and not everyone wants or can afford one. Improving the OS's individual boot time would benefit all users.