Well nobody exactly knows, but I imagine it's the same thing that happened when everybody stopped learning assembly language...

- a few people still specialize in it

- a lot of people are helpless if the problem exists at that layer, and just ignore or workaround it because it's not cost-effective to fix

- maybe in 20 years AI will already have closed those gaps. If not there may be a big supply/demand incentive for experts which would create high salaries and cause more people to specialize in it.

(To be clear I'm not trying to argue this is good, these are just my predictions)