I think the effort to learn and say something accurate and value added at that level of detail, almost inherently about new fangled stuff and often minor nuances, is probably too great for the tiny audience that cares about going down that rabbit hole.
Depending on the commentators, I do hear them talking about stuff in generalities or when there is something of note, particularly when it's sort of meta-commentary about the rider's relationship with the gear (your Froome example, Cav & Dennis about ther compulsions, etc.)
Ultimately, the real gear heads who would want more are not the target audience and they'd still be dissatisfied with anything that the rest of us could tolerate.
GCN has a guy going into recipes (yes, food) who probably plays to a bigger crowd.