I'll start off with one, Being upset about a breakup that happened hundreds of years ago.
Edit 1:
- Heath death of the universe, Death of the sun, etc, does not count. I feel like focusing on this is an overused point.
Edit 2:
- Loneliness does not count. I feel like we all know immortality means you'll miss people and lose them.
I once entered an extremely far back yet technically plausible birthday there and steam just wouldn't accept it. I remember thinking "what if Kane Tanaka wanted to check out this steam game, you just wouldn't let her?" (RIP by the way, she was the last oldest person whose name I learned. They change too often)