If all humankind ceased to exist, would time be altered or would time disappear or time would continue its course, unhindered and indifferent?
Time is a construct of our inherently egocentric, subjective consciousness, perception of reality. Thus without egocentric, subjective Human observers, there is no time.
On the other hand, this doesn’t mean that we have to cease to exist in order to rise above the egocentric, subjective coordinates of time, space, and physical motion.
We can upgrade our consciousness, perception of reality through a unique, purposeful, and practical scientific method, acquiring an unprecedented, selfless, objective viewpoint.
Anybody can achieve this by developing a new observer point through the thoughts, desires, viewpoints of other people.