Is all of hackernews webdev only? I can’t imagine “coding not being a job anymore” in fields like automotive, medical, military, robotics, and HPC

I think the fear is that the "higher" paying webdev jobs will be drying up while those traditional industries you mentioned still have the need for developers but auto, medical, and weapon industries never paid well.

Remember moving to New England to look for work and all the interesting embedded medical device companies paid like $80k less than a react dev job I got at an ISP.

Nope, whatever the customer hires us for, webdev, distributed systems, desktop, mobile, consulting on architecture, whatever makes them happy and gets us a contract.

I'm in Medical Devices and while AI is at best a small part of development right now, rest assured that we are actively investigating how to make it an approved part of our process. Then again, coding was only ever a small part of our job.

Of course not, but consider the size of the field if the “webdev” stuff goes away. Competition for the remaining positions in other domains become more competitive and you may find the floor rising faster than you can? Or you’ll find that weak, but cheap heuristics will throw you out with the chaff.