How long you have worked in a particular language affects how much you will be looking up function definitions.

Lots of other people working on the same project with loose standards means harder time assembling a mental model of the codebase.

Someone with cursor asked to program in a new language may be like “ah ok whatever sure” vs someone with vim might be like “it’s unreasonable management wants us to use these new age tools X works just fine” and then say “vim is so fast” in the same sitting.