The problem is maintenance and understanding code in the presence of bugs.

It looks very productive at first sight but when you start to find problems it is going to be a lot of fun on a production system.

Because basically you cannot study all the output that the LLM throws line by line if what you want is speed.

Which leaves reliability compromised.

Also, sometimes LLMs throw a lot of extra and unncessary code making things more barroquw than if you had sat down and thought a bit about the problem a bit.

Yes, you can deliver faster code with LLMs, maybe. But it is going to be good enough for maintenance and bug fixing?

I am not sure at all.