What could happen is another consensus layer that gave the right features and supplemented PoW was added to Bitcoin. This may happen in the future.
What if you had a TaPoS layer that had 1-10 second confirmations which worked with the miners where peoples wallets reflected both the ~10 min confirmation and the 1-10 second ones for added security and to allow for on the sidechain transactions to occur while not giving up on PoW security.