Without needing to get into an R vs Python discussion I think it is fair to say that this is a perfectly valid subjective opinion and that a lot of people will disagree completely... none of the ggplot2 Python ports holds a candle to the original, feature-wise. So the question is whether you will reach out for the lesser tool or learn a new programming style...
I'm not a big Python fan, frankly. But R is painful enough for me to keep looking around. Right now my workflow is to do all my data processing in another language and just use R for plotting.
With the Apache Arrow project, my understanding is that there will be an opportunity for languages like R, Python w/Pandas to share in-memory dataframe structures. I could imagine a future world where much tighter interaction with languages like lisps or Haskell.
