Age can't be an important factor, for every benefit of being your there is an counter one for being older.

Young don't have a family to support so can work long hour. Older person, has secure financial position so don't have to take a paying job on the side to get by.

Young have more energy Older people do less partying and drinking so have more energy

etc.

Hmm I was thinking of trying to get a secondment with our companies VC arm - to try and leverage my experience and to get experience of due diligence so that when our employers make huge investments we don't find out about this new integration challenge in the FT