Same reason for failure

Name the specific condition that would kill each option, not a vague "it might not work." If both die from the identical breakdown, keeping both buys you no protection: one bad stretch takes out your whole shortlist at once.

Name the specific condition that would kill each option, not a vague "it might not work." If both die from the identical breakdown, keeping both buys you no protection: one bad stretch takes out your whole shortlist at once.

Example

Time-blocking, the bullet journal, and the task manager all end the same way: a week with three crises, nightly planning skipped for four days, and no system left by Friday. One failure condition kills all three, so the shortlist is really one bet.