Unfortunately, it somehow all gets lost in the shuffle of BS created by those trying to motivate the situation politically.
The concept can be applied to many different things.
The information age didn’t move beyond books and newspapers because a lack of paper and ink.
Transportation didn’t move past carriages because we ran out of horses.
We will, someday, move past petroleum for transportation fuel. Those that think we should hold on to ours while funding everyone else should consider, who will have the funds left to develop what comes next?