“Do they have 30 years of experience? or one year, repeated 30 times?”.
If it’s the former, then 30 years of experience is undoubtedly worth much more than 20 years of experience. E.g. a surgeon who is dealing with new cases all the time will benefit from the 10 years of additional experience.
If the latter, then there’s a very limited benefit to having an additional 10 years of experience — if you’ve been washing dishes for 20 years, sure you’ll get better with an additional 10 years experience but not that much better.
I heard a quote recently which might link:
“Do they have 30 years of experience? or one year, repeated 30 times?”.
If it’s the former, then 30 years of experience is undoubtedly worth much more than 20 years of experience.
E.g. a surgeon who is dealing with new cases all the time will benefit from the 10 years of additional experience.
If the latter, then there’s a very limited benefit to having an additional 10 years of experience — if you’ve been washing dishes for 20 years, sure you’ll get better with an additional 10 years experience but not that much better.