Since they have hid them for this long, showing this 3 character code will not help as much as it would have if they never hid them in the first place. Thankfully people deal with a small set of extensions so I would imagine over time it would make some difference and just the concept of any .xxx.yyy is probably bad would help. I have been turning on where I can can see file extensions since they started hiding them, which honestly I do not remember when they started at this point.
Also.... Pinning stuff the start menu Quick Launch... The icons from Quick Launch do not move around on me, when I want to open Chrome the Icon isn't all the way on the left some times and some times in the middle. It hurts productivity. Yeah I turned it back on in Windows 7.. Just wondering if I will be able to in Windows 10.