Re: bikes, I've found most CF frames lack fender/rack mounts. If you want utility (commuting, shopping, travel), aluminum is going to win out. For example, I can't think of a single CF cargo bike.
My username may give this away, but after tens of thousands of miles ridden on a variety of frames, I've settled on chromoly steel as the most versatile material. In fact I just picked up another steel frame bike this past weekend with a rack for panniers and a fork that can fit gravel tires.
Regardless I find it very strange to compare a laptop with a bicycle. You would pick the materials when constructing either one for very different reasons.
Specialized Diverge does have fender/rack mounts (although you need to replace the stock seat post clamp with another one for the top rear rack mounts, but Spec does sell one). It's not exactly a utility bike, but for touring around civilized Europe it's a very good bike. :-)
