Hey, thanks for your contribution. Are you aware of the new openxlsx2 package by @JanMarvin? It seems to have a lot of formatting functionality built-in: https://janmarvin.r-universe.dev/openxlsx2/doc/manual.html

The vignettes are also very extensive: https://janmarvin.r-universe.dev/openxlsx2

In what way would we benefit from duplicating this functionality in writexl?

It's totally up to you. :) I just prefer to use writexl as it is fast and works well. I just wanted those convenience options to the result. I can't install openxlsx2 from Bioconductor or CRAN so I have not been testing openxlsx2 (not available for 4.3.1 on windows) but I can see that this has a lot of functionality.
I like the simplicity to just write writexl::write_xlsx(df, "./results/output.xlsx") when I have to share something with people not using R and almost always they have to freeze top row, adjust column widths to see the column names and and set autofilter when they explore the result. As I undesrtand from #4 I'm not alone.

In what way would we benefit from duplicating this functionality in writexl?

If we had done it first in writexl we wouldn't be duplicating. A lot of the formatting functionality was already available in libxlsxwriter.

In what way would we benefit from duplicating this functionality in writexl?

If we had done it first in writexl we wouldn't be duplicating. A lot of the formatting functionality was already available in libxlsxwriter.

exactly, I only used the options that the current bundled version of libxlsxwriter provides