As in all lighting, there are aesthetics to be considered and while standing at a counter or involved in preparation there is little visual impact.
However when sitting at a dining table the bottom of the cabinets and the fixtures become visible. Is that presentable?
Another factor is the "W" effect visible in the backsplash which is easier to overcome, or lessen the effect of with a linear tract system prevalent in xenon, as a for instance, and the ability to locate them tight behind the cabinet face frame, add lamps and dim.
Next could be for those who choose to eliminate elec. recep. and switching from the backsplash and use plug-mold for counter appliances mounted to the cabinet bottom.
Then there is the dimming. How in that accomplished and is there a PDF detailing the component parts.