If your value as a consultant lies in having an up-to-the-moment operational skill with today’s hot application, you will never remain an expert. Organizations will eventually hire or build internal expertise, and your advantage will be fleeting. You will always be chasing the next shiny object.
If, on the other hand, you are known for having strategic insights, for being focused on your client’s outcomes, and for being flexible and creative, your expertise will never become outdated. Your clients hire you for your wisdom, not your oh-so-current skill set.
There will always be other people who are familiar with bleeding-edge technology, but no one stays at the bleeding edge for long. When you’re known for your thinking skills, your value increases every year.