First of all, I do understand that a “think longer” feature is a thing, but it is extremely limited. I would suggest a slider/threshold setter where you can allow ChatGPT to ponder for as long as it can, even 5 hours if you wish. This would be great for things that require precision, considering important decisions etc.
Now I understand that something like this would be potentially a net loss for OpenAI since people may not see a reason to upgrade to ChatGPT plus, so perhaps make it a plus only feature? Feel free to critique in comments, and I shall edit this post accordingly.