Bash might be consistent, but what about the programs you're calling out to? Even basic utilities have different options between BSD and GNU Coreutils. Somethin

Bash might be consistent, but what about the programs you're calling out to? Even basic utilities have different options between BSD and GNU Coreutils. Something like git might not have options you're expecting due to differences between versions. Or if you need to download a file using HTTP, you will run into a problem when you run on a machine that has wget when your script was expecting cURL. And yes, you have these sorts of problems with other languages, but my point here is that Bash doesn't free you from them.