At my workplace, we outsource a great deal. Of all the companies we outsource to, the employees of two are very upfront that they use LLM "assistance". Their output has been getting worse and worse since that started, about a year ago. Firmware produced with LLM assistance results in hardware that does not work reliably. Tools created or maintained with LLM-assistance do not function reliably. In short, LLM-created product doesn't work in my direct experience.