I think that this gets at the heart of the miscommunication between the OP and some of the responses. If the original Shulton formula was gone before you were born, maybe the stakes are different for you. For many of us, Old Spice became a suspect juice when they slapped the yacht on the jug, not just when they shifted to plastic. The late lamented ClubmanRob claimed that there were several reformulations:
I have no reason to doubt him, and my sense of the difference between the scent of various generations of Old Spice as well as the Ivy Club clones tends to confirm it to my satisfaction. Not to say that the difference is extreme--just enough to get under our skin.
This is the key to the whole thing. Those of us who are unhappy with changes in Old Spice are not people who care much about New Coke. We're the people who are still mad that you can't find a good bottle of Moxie anymore.
Y'know, it's really great to belong to a forum that has some reasonably articulate and literate members like the Nid!
I have a "couple" of bottles of Old Spice myself, some of which date back to the late 1930s/early 1940s, and I can assure you guys that there are subtle but detectable differences (not related to evaporation) when comparing the old juice to the post Shulton Old Spice.