Do I need to use Grunt?
Do I need to use Gulp?
Do I need to use Sass?
Do I need to use React?
I see people asking these type of questions a lot, and I think the answer should be to ask what problems each of those things is trying to solve and do you have those problems?
If the answer is yes then you probably should be using the ones that help to solve those issues, but if not then why over complicate your work process?
Don’t be afraid to KISS (Keep It Simple Stupid) your workflow.