The section in the r studio documentation called Computing On The Language is by far favourite feature of R

It lets a function observe the context in which the function was called, which is why R can contextually use formula notations so ergonomically. That also backs pseudo symbolic computing, like plotting a function over a domain and magically getting the right chart titles.

That language support is why Python libraries struggle so much to replicate the ergonomics of the tidyverse.

https://rstudio.github.io/r-manuals/r-lang/Computing-on-the-...