>>2519090It's the memories behind it all that are gone.
Looking at a shitty 5x5 tunnel that you and your soon-to-be friends spent 8 hours digging, not having a single clue where you're going or what you're doing, and saying "we did this together."
Making a half-assed Christmas tree and cake while being attacked by phantoms because you don't know why they spawn, and saying "we were there together."
Efficiency or ease-of-duplication aren't what's important. It's how they spent dozens of hours between them building something from nothing that is, and how in literally seconds everything they did just up and vanished.