Works well enough.
Of course accomplishments per era could decrease when we're judging the last few years against much larger time spans of the past.
Someone like Bill Gates could hire someone with the technical expertise while spending his own time on more productive things that are likely to yield more good for the world--networking with other billionaires to convince them to donate money, working to manage the overall structure of the B&M Gates Foundation, etc.
Complex systems are complex. 200 years ago, the amount that we knew was significantly smaller; one could get to the edge of human knowledge with just a few years of intense work. In contrast, it takes significantly longer to get to a level of expertise at which one can productively contribute.