Imagine you need to provide Cisco switches for manufacturing equipment (i.e., robots). This is a mission critical environment.
Instead of placing (2) stacked Cisco 3750 48 port switches (with RPS 2300) I would put (2) 3750 24 port switches. That way I would force low density thus minimizing the impact on the manufacturing facility in case switch goes down or suffers interruption.
Does that rationale make sense to you?