I agree that there will be a need for react/angular talent for many years to come. That said, I think engineering orgs are picking up on the fact that rolling web apps this way introduces lots of complexity and requires lots of resources to maintain and extend. I really don't want to think about regularly maintaining a 10-year-old redux-backed react app down the road.

Whether react/angular/vue are able to continue improving enough to justify staying within that world remains to be seen. It's very early days for some of the new frameworks out there, but with web assembly on the horizon, companies will again be motivated to modernize, however that looks.