For future greenfield projects, I can see a world where the only jobs are spec-writer and test-writer, with maybe one grumpy expert coder (aka code janitor) who occasionally has to go into the code to figure out super gnarly issues.
This is already happening, many days I am that grumpy "code janitor" yelling at the damn kids to improve their slop after shit blows up in prod. I can tell you It's not "fun", but hopefully we'll converge on a scalable review system eventually that doesn't rely on a few "olds" to clean up. GenAI systems produce a lot of "mostly ok" code that has subtle issues you on catch with some experience.
Maybe I should just retire a few years early and go back to fixing cars...
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A good spec-writer, as the article notes, is writing code.