Without LVM or selinux or software RAID or zeroconf, it's not going to be a "useful" computer in many environments, more like a toy.
None of those seem particularly important to me, with the possible exception of SELinux. I don't use LVM or RAID on my desktop, and I *certainly* don't use zeroconf. Why would I care about those things on a normal system?
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.