Without the same fluency in bashism from using it for day-to-day activities, the colleague provided script is less readable and less editable for the fish-fluent, bash-inarticulate. Any fish-specific scripts are also of low-value to colleagues.
It's not that it's impossible to be a shell polyglot, but GP deemed it easier to learn !fish.
It's not that it's impossible to be a shell polyglot, but GP deemed it easier to learn !fish.