7mm Rem Mag isn't broke so there was no reason to "fix" it by doing the whole WSM treatment. I've shot a 7mm Rem since I was 14. My brother shoots one, my late grandfather shot one, my late father shot one and none of them needed "improving".

It was a brilliant marketing concept and helped sell a lot of rifles but 100-200 fps from any 2 different rifles of the exact same caliber don't make a bit of difference in the performance on either game or targets.