Thanks Beth for your wonderful comment, which contains more than one concept. I like your LifeBio concept that you added to the Ideas section, and I think that it is worth it for you to add also the other concepts that you mentioned in your comment.
Thanks Tommy. Your comment/question raises big issues that require major reforms in the "Work" super-system. Hiring is still looked at as "filling a vacancy" rather than "matching the right talent and knowledge with the right Job-to-be-done". As a result most people end up filling the wrong jobs. Switching jobs, hoping to find the right job becomes more challenging as the person gets older, making many people settle for the wrong job, awaiting their retirement! For such people, the knowledge that they gained over the years is actually a burden, that they unconsciously let go after retirement.
On the other hand, those who have the right job, retirement comes as an unwelcomed guest. For most people they no longer can use their knowledge, and begin to leak that knowledge with time. The professor that you mentioned is an example of someone that had an opportunity to prevent the leakage of his knowledge, but I think that this professor represents the lucky few who get the opportunity to maintain their knowledge after retirement.
We surely need new ideas/concepts to deal with these big issues. These ideas need not be as big :)
Thanks Ryan for introducing me to Lumosity. I like it, but it does not cover the scope that I have in mind. While going through its features, I remembered the phrase that Edward de Bono usually says: "Excellent but not enough"! From the KM point of view, I think that Lumosity only deals with the "process" side of Knowledge, and does not address the "content" side. Your recommendation to have a personal knowledge file is a good start to address the "content" issue.