"The majority of geneticists were still concentrating on protein at the time, and were apparently loath to abandon something into which they had poured so much time and intellectual energy."
A scientist may devote years to conducting their research, only receiving small advancements. They do this because of their passion for the field of study they are in, but when is enough, enough. Think of the discoveries that could have been made if scientist moved to another project after a certain amount of time. Contradictory, how many discovers wouldn't have been made if it wasn't for their persistence? I think it a topic that needs to be discussed, when is it time to move on to anther project if you only making minor advances in the current project. Could the passion and persistence of scientists be hindering the discovery of other products, at what point should I scientist move on from their projects if they are only processing slowly?