@bb052609 if you want its usefulness coldly quantified in comparison to other phalanges and you don’t mind the macabre, look at a pricing schedule for dismemberment insurance. 

 @bb052609 You could try the other hand?  When I broke my right wrist a few weeks into college, I spent a long time using my other hand.  As I was in the OTC, this included saluting.
My, English teacher, mother liked to employ a malapropism by telling all her friends that I was amphibious! 

 @bb052609 I almost cut-off my left index finger a few months ago. They were able to save it but I have no feeling in it at the moment. I can't believe how much it is affecting me right now. Don't take your digits for granted!