I was tasked with taking over some of jeffiel’s code bases around the time period we are discussing here. He perfectly skirted the line of telling me what he was thinking while writing stuff and simultaneously staying out of it and letting the people he hired take the reins. He spent most of his time interacting with Cxx and Director level people to set the tone and direction of the company, while still taking the time to know what ICs were doing so that he could usefully answer questions and use our products.