well why not extend the analogy further? it's worth noting that in this arrangement, the natural is order is the parent eventually dies after a long and possibly painful period of decline, while the child rapidly develops into an adult within 18 years, with the expectation of outperforming the parent by the time it reaches middle-age (35 or so). at which point the cycle repeats and continues.

this is HN, you have to think through your snark or it will snark you back.