Minecraft
Minecraft's reliability depends entirely upon external factors beyond its control. Server downtime, software updates, hardware failures, and internet connectivity issues all pose existential threats to gameplay continuity. The game cannot function during power outages, rendering it helpless against infrastructure limitations.
Furthermore, Minecraft requires ongoing corporate stewardship to maintain functionality. Should Microsoft, its current custodian, ever discontinue support, the game's long-term reliability becomes uncertain. Digital products, however beloved, remain subject to corporate decision-making.
Monday
Monday has arrived without fail for approximately 4.5 billion years of Earth's existence, predating humanity's emergence by a considerable margin. No technological failure, economic crisis, or global pandemic has ever succeeded in preventing Monday's appearance. The day exhibits a reliability that borders on the inevitable.
Even calendar reforms across human history have merely renamed Monday rather than eliminated it. The seven-day cycle persists across cultures precisely because it cannot be stopped. Monday's reliability is not a feature but a fundamental property of time itself.