[bryanrasmussen]

well if X10 engineers exist, and these two are them, it's like 20 engineers just left.

Or also if the project has 10 engineers, and the first is the lead who knows everything and the second one is the one who knows deeply about some real important dependency it could suck - losing 20% of your engineers on a project is bad enough, but the two most important ones comprising that 20% could derail a project.