This is in contrast to Apple's internal software systems, at least if recent reports seem to be accurate; aside from (I assume Xcode), it seems the business-ey enterprise stuff is outsourced to contractors and software consulting firms and is a giant mess...

Granted, their DNA is still in hardware/devices/OS level stuff versus "services" despite all they claim to be, but how much more quickly could they move if they "owned more" of their stack?