"There are much fewer opportunities if they do not want to work on productizing large-scale language models, and these positions are disappearing quickly." Yes

"There are much fewer opportunities if they do not want to work on productizing large-scale language models, and these positions are disappearing quickly." Yes. In 1900, the thing to be was an expert electrician. I had a friend with a PhD in bio who ended up managing a coffee shop because she'd picked the wrong branch of bio. LLMs may be able to help with productizing LLMs, further reducing the need for people in that area.