I'm surprised at this, LLMs have had many developments since Gpt3.5, technologically and culturally. What kind of developments would be impressive to you?
They tend to poke the free ChatGPT for ill defined requests and come away disappointed.
The nice part is I can spend an hour or so writing specs, start 3 or 4 tasks, and come back later to review the result. It's hard to be totally objective about how much time it saves me, but generally feels worth the 200/month.
One thing I'm not impressed by is the ability to review code changes, that's been mostly a waste of time, regardless of how good the prompt is.
If you're not using AI for 60-70 percent of your code, you are behind. And yes 200 per month for AI is required.
That's a low bar.