At present, in what aspects is Julia still relatively weak compared to other mainstream programming languages?

[mkitti]

There is the whole Tidier.jl ecosystem which I think tries to address the R approach directly.

[ANN] (Belatedly) Announcing Tidier.jl

With the 1-year anniversary of Tidier.jl coming up soon, I wanted to put together an official (if slightly belated) package announcement describing Tidier.jl to invite you to give it a try. Tidier.jl originally began as a package intended for working with DataFrames based on the R dplyr and tidyr packages as part of the R tidyverse ecosystem. That portion of Tidier.jl has since been split off into its own package (TiderData.jl), with Tidier.jl focused much more broadly on implementing the entir…

Also see GitHub - JuliaData/DataFramesMeta.jl: Metaprogramming tools for DataFrames