Depends. What if your nails required newer hammers? Would you rather wait for a newer hammer from a company that hasn't been meeting needs for years, or buy one from the store that had them when the nails came out?

Perhaps a better analogy is a screwdriver. Apple came out with their "pentalobe" security screws a while back - is it reasonable to buy one of the screwdrivers that is made for it that are available now if you needed to (un)screw one? The other options are to use a philips and damage the screw and suffer a lot of frustration, or to wait until Craftsman makes one (probably never).