You kinda can. I'm seriously considering that in conjunction with <http://entrproject.org/> for watching file changes.
I wrote the book Automate With Grunt out of anger at the terrible docs for Grunt and my displeasure that there was yet another build system out there. And just as the book was released, Gulp came along. Then Webpack. And now there's tools like Brunch.
I still use Grunt, because I spent time learning it. And I'll be damned if I'm going to waste time learning a new tool without a really good reason other than "Coke vs Pepsi".
(edited for organization because I'm tired.)