Technology isn’t going anywhere, but your technology might. To compete in a highly competitive arena, you will have to zero in on a particular area of focus and learn everything there is to know about it; at the same time, you should have sufficient knowledge of aerospace engineering in general so you can make the transition if your area of expertise becomes obsolete.
You don't want to have to go from designing space shuttles to being a short-order cook in a greasy spoon. We are talking a huge step down that can deliver a serious blow to your ego. Just like that huevos rancheros your diner is famous for can deliver a serious blow to your stomach.