> It thinks faster

It does not actually, and not any faster.

Again I've lost count of how many times I've had an in-depth architectural discussion with ChatGPT, with it giving me the final mark of approval ("This is excellent"), only for me to discover a flaw in my approach or a radically simpler and better approach, go back to it with it, and for it to proclaim "Yeah this is a much better approach".

These LLMs are in many cases sycophantic confirmation machines. Yes, they are useful to some extent in helping you refine your ideas and think of edge cases. But they are nowhere close to actually thinking better and faster. Faster in the wrong direction is not just slow, you are actually going backward.