I am neither old nor completely young. What I see in engineering is a huge competency discrepancy between old and young in favor of older workers by a significant margin, even if you account for the extra experience. An exception is software to a degree, but there is no guarantee either. Young people aren't stupid, it is just that the technical knowledge density is that high today that people might have neglected some basics.
Of course that isn't applicable in this example. I believe Biden more or less slipped into another candidacy because there was no real competitor within his party. But the discrepancy in competency is sometimes visible in politics too.
But he did well relatively.
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"old men" bring stability and (hard-earned) wisdom
Won’t see a truer headline today. One surprise is the medical industry, where the bias is insane and people get ripped off by the old snakes.