What is the difference between "nostalgia" and just having a long shelf life? If I buy tickets to see #TheRollingStones, am I being nostalgic for their glory days or are they "still going strong"?

From another angle: #StarTrek #PIC was clearly based on nostalgia for #TNG, but was #DSC based on nostalgia for Trek as a whole?

At what point does a long-lived entertainer, franchise, or whatever become nostalgic rather than long-lived?

#ThingsIThinkAbout