Some of us write code we will see over and over again in the years to come; some of us write code we will never see again. Some of us are on a very strict deadline; some of us have a bit more flexibility. Some of us have to write to strict coding standards; some of us don’t. “Brevity” means different things to each.
Code is communication. Some of us communicate with the compiler; some of us communicate with our future selves; some of us communicate with some unknown future maintainer. We do so because of the environments we are in.
When someone text messages CUL8R, they are being “brief.” To them, it is a recognizible element. When I get it, I have to parse it out… it is not immediately recognizible and, for me, it is not “brief” but tedious.