I’ve been coding for 39 years. I know how the process works. And yes, it does take time to get the deep understanding of any system. But it is not on the scale of impossible for a squad of 10x engineers to answer and/or develop some basic questions in a short time frame. And much more reliable than trusting the existing crew who has been quite publicly represented by persons hostile to their new boss. I do not in any way mean to cast ALL engineers at Twitter in this light. But it is quite clear the bullies there have grown quite accustomed to their pulpit.