Things matter partly because they end. Nobody treasures a show that never stops airing.

Value comes partly from scarcity. A last game, a final summer, a show with an ending: the limit is what makes you pay attention, and anything endless gets treated as background noise. That is a mechanical fact more than a sad one. The ending is part of how a thing becomes worth something to you.

Name one thing in your life that already has a countdown on it: this season, this school year, the last stretch of living at home. Then spend one evening inside it paying attention on purpose. The limit is not going anywhere, so you may as well take the attention it is handing you.