Phil went on a gameshow in his early 20s and won a lifetime supply of dual blade razors, which was cutting edge razor technology at the time. Now it is not uncommon to find razors with 3, 4, or 5 blades. It’s hard for people, even economists, to predict advancements in future technologies, which makes comparisons of goods across long time periods more challenging.
A second concept that can be taught through this clip is the concept of the endowment effect. Phil is very disappointed to see that his “lifetime supply” has run out because he infers that it shouldn’t ever end. Many “lifetime” products are actually a fixed number of items spread out over a fixed time period.