So, perhaps this has been discussed and I just missed the boat. I have some old La sportiva trangos that I have had for 6-7 years that dont flex at all-I weight the toes and bounce and theirs no flex. I just purchased some new trango boots as well as some new nepal evos and when I do the same exercise, the boot clearly flexes. Why? Why did la sportiva make the newer boots more flexible in the sole?