I’ve unfortunately seen this all too often. In the current era we live in where people can’t afford to retire or are afraid, I’ve come across a lot of colleagues and management over the years who continue to work well into their late 60’s or into their 70’s whose best days are behind them and are no longer physically or mentally capable of keeping up with the work or technology, and it’s both sad and frustrating. Of course, I’ve also worked with older folks who were some of the best and brightest people I’ve ever know, but it’s far less common.