congratulations to the JGR developers

I have not tried JGR but regarding your three adjective describing R,
R is very powerful but I am not sure I would characterize it as simple
and elegant -- complex and practical seem nearer to the mark to me.

I take umbrage (and not in the sense of affording shade).

Take 'simple' to mean plain, or having few ornamentations. Then it sounds
like R.  As for elegance, R is refined, tasteful, and beautiful. When I grow
up, I want to marry R.