Are automobiles on the way out in the USA and around the world?

Asking the same line of questions constantly every week will not give you the answer you want. No, automobiles are nowhere near on their way out. Technology will not go retro like you keep asking endlessly. In fact, the only chance for our race to survive is to continue to move forward or become extinct in the universe. But if you prefer retro, you can always join the Amish villages where inbreeding is slowly destroying them.

Cities around the world are growing in population & territory. Public Transit will never replace the automobile.

No, but gasoline engines are.