Design, writing specs: Same amount of time.

Finding the holes in your specs under automation: time spent is returned 10x

Writing code: Human 15 lines per minute. LLM: 600+ lines per minute

Functional Validation: same time per iteration. Fewer bugs with LLM when properly specified => fewer iterations. Increased awareness of LLM escaping specification boundaries feeds back into increasing quality of spec writing => fewer bugs.

The difference is that instead of spending half your time understanding the business requirements and half your time writing code, you'll spend half your time understanding the business requirements, 5% of your time typing these requirements into a chatbot, and the rest of your time doing... ????