I'm not a statistician, but what you are describing is a situation in which the survival of the "subjects" (SSDs) is the crucial variable. How quickly the population declines is the question.

This is similar to studies in medical research, e.g., how long do subjects live after an experimental cancer treatment. What I've seen used is the Kaplan-Meier non-parametric method (Kaplan-Meier plot) for the purpose.

Maybe I'm just used to seeing these plots, but I find the method conveys information very effectively. More info can be found here: https://en.wikipedia.org/wiki/Kaplan%E2%80%93Meier_estimator

I agree that presenting the SSD life data in that way would be a good idea.