I am an older software engineer and have noted that a lot of introverted engineers love to work in their own silos. Some of the smartest engineers are introverted and do not want to be bothered; worse yet, because of pride they often do not "suffer fools" well and avoid working with others. Working with a group of smart and humble engineers that are constantly "borrowing each other's" brain is very effective and enjoyable experience. And everyone has a good sense of what everyone else is working on -- sunk cost is more frequently avoided.
I feel the same way. Lot's of experienced engineers don't like to be bothered too much, have the feeling they know best and just design and implement the way they have it in mind. Juniors on the other hand don't like to bring their beginners mistakes too much in the open, hence they work hard and long to avoid that. Both of these situation are largely sub-optimal. A good manager knows this and asks for feedback in time, in an interested way, without being too pushy.
