I really don't understand why anyone writing articles about ChatGPT uses 3.5. It's pretty misleading as to the results you can get out of (the best available version of) ChatGPT. For comparison, here are all the author's questions posed against GPT4: https://chat.openai.com/share/ed8695cf-132e-45f3-ad27-600da7...
It's a bit hard to use for most, either $20/month fixed for a limited # of messages, or you need to be able to reason through how to get an API key, or get another 3rd party service with similar cost & limits.
Actually maybe the recommendation should be to use GPT-4 for free via https://copilot.microsoft.com/ instead now.
(Except I can't tell which version of GPT that's using yet - there was a story on 5th December that said GPT-4 Turbo was "coming soon", not sure when "soon" is though: https://blogs.microsoft.com/blog/2023/12/05/celebrating-the-... )