Comment by whiddershins

Yes! So many examples of why.

What if I want the sound of rustling leaves to come and go across the course of a song?

What if I wanted my piece to happen over a drone tone similar in function to a tamboura or a constantly feeding back electric guitar?

What if I wanted to have another sort of loop and while playing it back, experiment with different tempos against it to see what sounds right?

And a zillion other things.