I agree but need to have "free" defined. If there's another truck 100/200m ahead then it's a pain in the ass because like the other said, others behind you won't do the same and will do a slight acceleration when you go in the right lane (because free space in front = accelerate hurr durr), preventing you from changing lanes again when you get to the next truck and so you have to brake and hope you get a gap again soon to overtake the truck.

If it's literally empty as far as the eye can see then yeah, move over!