The only exception is function calling (or whatever they call structured output these days), but that is simply embedded in my or other people's programs that call the API.
I use conversational English for basically every prompt I work with ChatGPT on as a regular person.
For my application, I have prompts that I have stored in source code, but those need to have very consistent, exact inputs and outputs (mostly JSON), so creating a specific prompt is important for those.
For anything human where a human can parse it, regular ChatGPT works perfectly fine!
What I've said does smell of the Super Smart(tm) and completely unhelpful Stack Overflow response, I will give you that.
Beyond that, the previous chats could practically be deleted for me. Its not like my prompts are such works of art that I couldn't recreate the thought if needed. Not to mention, Sonnet has made me not use chatGPT for about a month now so the blog is nicely divorced from the LLM flavor.
If you're doing ad-hoc things, yeah, just ask. If not, prompt management saves lots of time.