It used to be normal to use the n word to describe black people, why did that change? Why isn't it ok to simply keep using that word? You're argument is flawed

It used to be normal to use the n word to describe black people, why did that change? Why isn't it ok to simply keep using that word? You're argument is flawed. Constant improvement and constant self examination and constant self improvement are required methodologies to write good code or make good projects, yet here you are arguing the opposite