Let's concede that older programmers in their 50s may have less free time to learn new technologies than a 20-something. Shouldn't we also consider how much les

Let's concede that older programmers in their 50s may have less free time to learn new technologies than a 20-something. Shouldn't we also consider how much less time it will take an experienced dev (who has perhaps already learned several new languages and frameworks over their career) to learn something new when compared to the 20-something who is learning their first or second one? The number of hours required to learn a second language or framework - which may rely on entirely unfamiliar paradigms and principles - may be much higher than the time required by someone who has already learned several over many years. When considering the learning ability of any developer, free time is only one consideration. Past experience learning has to be another.