My concern with this approach is that it gives the impression that you can use all the same switches that are available to the real shell commands, which isn't

My concern with this approach is that it gives the impression that you can use all the same switches that are available to the real shell commands, which isn't the case. For example, taking the first command documented on the README, cat, shelljs supports the -n switch only, but `man cat` shows about 10 switches for me. So although I agree that the learning curve is lower to get started, you do have to remember that the switches are limited and be sure to check the docs to see which of your shell command switches are supported.