Benchmarks https://h2oai.github.io/db-benchmark (not the best examples, because dtplyr or tidytables exist, or Cython and Numba for Python, but good enough in my book)
Better implementation of C++ (Rcpp) and other languages, but my knowledge on this could be outdated and wrong.
Python can't run R, but R can run Python.
Library mention necessities (Python's pd.xyz vs. R's xyz or library::xyz)
And for me, the syntax being similar to human languages (that I know) is pretty nice -- subject first is common. For example:
df |>
function(args)
subject |>
verb(object/'adverbs' or the hows)
It's a crude example, but it works for me nicely.
Dependencies
Last but definitely not least, debug messages