Great insights, Rick.

The thing that bothers me about the "line plot simulation" is that the horizontal axis, even though it is meant to be categorical (age groups), seems to imply a time dimension (as time goes on, your participation changes).

That might be okay when charting some activities (such as a chart of who participates in colonoscopies and hip replacements), but I don't want to think that I'm doomed to become a social media introvert in my later years.

Chris