Just think about it...why do the same purpose tools have a different price tag? Obviously, to keep the price low they have to do magic/s. Have you ever seen the video on how those files are manufactured (a manual process), just for the sake of understanding what is involved?I agree with most members on this issue. I would never spend a fortune on expensive files thinking they will last a life time. They are like sanding disks and drums, they wear out and plug up over time regardless of how often and whatever method you use to clean them.
There is no brainer that good tooling steel will cost more, also the machinery involved must be precise for the final product to be competitive.
But, as I said earlier, there is no right or wrong, thanks to the availability, we can choose what we like.