Some Chinese cars come without their own battery. The batteries are designed for quick exchange and leased to the vehicle owner, who pops in for a quick substitution of a fully charged fresh pack when necessary. It takes moments apparently and is competitive on price. I can see this becoming popular, especially as the battery supply network expands. The only negative that springs to mind is battery theft may be too easy.
It is impossible for anything digital to sound analogue, because it isn't analogue!