The only way Adobe can get out of this conundrum is by announcing a transition to a new interface, finding ways to incentivize schools to teach the new interface, while keeping the old one around for as long as possible to give time for the oldies to slowly retire. We're talking decades.
The user interface is extremely customizable. You can have a default layout and still keep legacy ones around. You wouldn’t need to kill the legacy layout unless you are removing the cuetomizability.
