Developers aren't getting replaced until we have strong AGI. GPT still hallucinates it's output much of the time. You need someone who can review that output before you can trust it.

Maybe LLM's get to the point where they really help dev productivity, and we wind up needing less devs overall, but that hasn't happened in the past when easy to use frameworks like rails made it super easy to spin up a twitter clone. In fact, employment exploded.

TLDR: Devs won't be out of a job until we run out of things to automate. Sometime around the heat death of the universe or we're being crushed by skynet.