One random example I found recently is a tidyverse package called forcats that has lots of nice functions for categorical data. For example, it has a single function that merges all categories with a frequency of less than a certain threshold in the table into a new category like "other" or whatever. This is a task I often need to do, but as far as I can see it's a bit of a hack in python or pandas. It's just lots of little things like this, especially wrangling data tables.

https://forcats.tidyverse.org/reference/fct_lump.html

There's also the data.table package for this kind of data work, which is maybe less used but seems to have better performance.