This is a good point. I've done a fair bit of R and there is no doubt that as a pure data science tool it's usually quicker to produce something than Python.

This is a good point. I've done a fair bit of R and there is no doubt that as a pure data science tool it's usually quicker to produce something than Python. But I prefer Python because inevitably any data science project ends up having other "bits" that aren't pure data science, and Python's super string general purpose computing libraries are hard to beat.