The back catalog is more important to a real entrepreneur. Someone looking for entertainment in the disguise of education content would find the "hot" stuff interesting.
Someone building a business cares about specific topics because they are having issues with specific things like search engine marketing, sales people, partnerships, law, etc. That may or may not be covered by the latest "hot" stuff but a quick search in the back catalog is likely to turn up a good interview.
It's typically the recent stuff that's 'hot' and therefore has the most value, while the older stuff tends to be more of a curiosity with less value.
Plus, a wide-open back-catalog is more likely to attract references from places like wikipedia, from people trying to cite it.