Is your point that 40+ aren't doing Math and Programming, so one should not aspire to be doing that at 40+? But why aren't 40+ doing Math and Programming? Beca

Is your point that 40+ aren't doing Math and Programming, so one should not aspire to be doing that at 40+? But why aren't 40+ doing Math and Programming? Because they've moved on to other challenges, or because they are being replaced? Aren't we back to the original point?