For developers ChatGPT is like having a team of good juniors on your fingertips. I think it can increase the productivity of a senior engineer probably three fold. But you must do code review and understand the code.
Yes, I believe it is specifically good when you have a lot of experience so you can immediately tell what is correct, what is wrong. I think this is an excellent time for experienced engs in the market, because GPT might in certain terms hinder low experience engs, but scale exp engs output many times.