Minecraft
A Minecraft world, properly backed up, possesses theoretical immortality—at least until the heat death of the universe renders all computing infrastructure moot. Digital structures face no weathering, no structural fatigue, no vandalism from pigeons. The cobblestone castle erected in 2011 remains precisely as constructed, every block maintaining atomic-level perfection impossible in physical architecture.
Yet this durability depends entirely upon fragile technological infrastructure. Server failures, format obsolescence, and corporate decisions can erase entire civilisations of player construction. Microsoft's acquisition of Mojang introduced existential anxiety into a previously carefree creative environment.
Time
Time's durability transcends the merely impressive—it represents the most fundamental constant of existence. Current physics suggests Time has persisted for approximately 13.8 billion years and shall continue until the universe achieves maximum entropy, a period measured in numbers so large they require scientific notation merely to write. Time cannot be damaged, corrupted, or accidentally deleted during a server migration.
Theoretical physicists at Cambridge note that even black holes, capable of destroying all other phenomena, merely distort Time rather than eliminate it. This represents durability on a scale that renders Minecraft's cloud backups somewhat quaint by comparison.