This "sunk-cost expertise" can easily become a set of shackles.
this creates a sunk cost investment that we're inclined to psychologically over-value and defend.
First, many of us are independent, or loosely affiliated, or working within organizations that do not offer the kind of support for ongoing inquiry that is required.
This turns the situation into a trade-off between making a living and developing professionally, over one's entire career.
A century ago, an intellectual expert could learn a way of looking at things and build a lifelong stable career off that platform.
One good set of insights, steadily updated through inquiry and learning, could last the three or four decades of a normal career.
That is, if you build a worldview today and then stop learning, your insights will be out of date in a decade.
A) It means that maintaining evergreen expertise takes way more time and energy than it used to, and demands more personal investment risk.
Like speaking two languages: One understands not just the words, but something new about language and thought itself.
I expect to do it at least once more.
Building four world models in one career is not an experience many humans have ever had I suspect—but I also think it's going to be increasingly common for folks trying to grasp the big picture.