++x and x++ just seem so unnecessary. Two extra operators for a very specific case, in which they either safe one character verses x+=1 or mix different mutations into the same line. Iterating a list by incrementing an index doesn't even come up that often if your language supports iterators well.

Edit: Just checked, the project I just had open has 7 instances of +=1 in 5k loc and none of them would have been improved by ++