Do you mean they use <i>Python</i> because it&#x27;s faster? yes sure. But then, just use scala. 10x faster again. With a REPL.<p>Perhaps I should clarify, I&#x27;m talking mainly time series and&#x2F;or data which is vectorizable. Python is better if you&#x27;re scraping the web. If there&#x27;s a lot of if else going on. Ie imperative programming.<p>R&#x27;s native functional aspects (all the apply family) and multilevel vector&#x2F;matrix hierarchical indexing is better built from the ground up for large wrangling of multivariate datasets, in my opinion.