> How can I compete with a 20 something years old who has sharper memory, more free time (due to lack of obligations like family/relationships),

Is it a USA/Silicon Valley thing to miss the arrogance and insufferability most fresh grads have when entering the workforce?

It's kind of tone-deaf to attempt to self-victimize as someone with significant work experience being concerned of being replaced by a demographic that is notoriously challenged to build experience.