Who finds it sad that so many things have been lost from the culture? For example only two of the new airbenders (excluding Tenzin) shave their heads, and even Meelo, who has grown up with the customs, has grown hair. I was surprised to discover the other day that Jinora does not shave the front of her head, either. Her arrow is smaller than Aang's so you can see the whole thing but it is a shame, seeing as she seems the most likely to follow the old ways. Also the robes. From what we have seen in flashbacks, once an airbender finishes training, they leave behind the training outfit and wear robes of their own design. With the advent of the wingsuits, however useful, it takes away another part of the culture. Same applies to the gliders, as they appear to have been scrapped.