Every cent saved on a mouse in a 100,000 mouse batch puts 1000$ in your pocket. Money, nonetheless. Plus nothing guarantees Japanese switches aren't gonna break or last longer - German Cherries (DG series) break fast AF (due to low rating, I assume).
And those ALPS are more trouble than outcome, as they require a robust sub-micrometer precise housing. Have been endlessly trying to fit one with small plastic arches of various designs. As I lack factory equipment, to no avail - it's either too much friction or too much rattle. No wonder only one company managed to implement it properly and make a distinguished feature out of it (although I hear CM managed to fix the rattle on their Recons after all).