Does it make sense to use Grunt/Gulp?

Question

css

Does it make sense to spend time learning/configuring Gulp/Grunt?
As I understand it, they perform the following functions: concatenation, minification, preprocessing, etc. At the same time, there are many programs with a pleasant and intuitive interface that perform the same functions, for example, Prepros. It is enough just to click a couple of buttons, without the need to remember, configure and delve into extra lines of code.
Is it rational to waste time on such "perversions"?

Answer 1

I liked using the settings to switch the build between production and developer version without creating "stubs" in the code with their manual cleaning after and returning for revision. Done with plugins. Usually, after the "end" of development, dances with a tambourine begin, how to transfer everything to production, or at least to another machine. And then jambs climb ... Does it make sense to look in order to understand how I lived without it? )

Answer 2

I use Gulp very cool stuff!
You can not only perform the functions that you described, but also other goodies, create sprites, use LiveReload, assemble an assembly.
In general, there is a lot to tell, but better look at this: https://learn.javascript.ru/screencast/gulp