This goes back to how we define "novel problems." Is a dev building a typical CRUD webapp for some bespoke business purpose a "novel problem" or not? Reimplementing a well-known standard in a different language and infrastructure environment (e.g. https://github.com/cloudflare/workers-oauth-provider/)?

I'm probably just rephrasing what you mean, but LLMs are very good at applying standard techniques ("common solutions"?) to new use-cases. My take is, in many cases, these new use-cases are unique enough to be a "novel problem."

Otherwise, this pushes the definition of "novel problems" to something requiring entirely new techniques altogether. If so, I doubt if LLMs can solve these, but I am also pretty sure that 99.99999% of engineers cannot either.