Lazy troll is lazy. I like that my Linux-based head-unit comes ready 3 seconds after starting the car, so the volume control works, and if I was listening to a simple input like the broadcast tuner at the last shutdown, it returns to that and I've got music right away. It takes a little longer for maps to render, and longer still for the Bluetooth module to load, but that's okay. Delaying simple functions until all the most complex stuff had loaded would be a terrible UX.