Products come and go. Some, you may totally understand that go away and have a very short product life cycle (PLC). Others, you may have gotten frustrated because it was a product that you really liked and it is no longer being produced. Please share of a product that you really liked that had a relatively short PLC. Also, please share about a product that you do use that has been around for decades. Why did the one products PLC be so short, and why is the other products PLC still existing?