Deep in the future when the human mind, evolved for survival, is an obsolete decision making device, what purpose will motivate actions?

Deep in the future, pleasure and pain will be mastered. Technology will allow humans to experience pleasure or pain however they want. The search for meaning and purpose will become more and more difficult. Death will be mastered. People will not be forced to die. We'll understand the universe with more clarity. We may find a secret, something like the universe is a simulation created by someone or something or some group. That would be amazing. Although it may not be the case.

A clear understanding will exists that each human is an organized chunk of matter that serves as an expiriment, natures way of finding a better survivor or contributor. Emotion defines the deep motivation implanted into these experiments to guide them in where to put mental effort.

However, emotions developed millions of years ago to make tribes stronger. They can't be relevant forever. If they have not become obsolete already, they will. Then what will be the deep motivation of humanity?