Great metaphors stand the test of time, long after whatever they referred to have been forgotten by history.
Today, we still say something has a "
full head of steam" even though no one has seen a steam locomotive in a century.
We still say "
we're setting sail", or when "
the wind is at our backs", "
we are full sails" even though no one has sailed on a ship which uses the wind to generate motion for longer than a century. In fact, even today, the act of guiding and navigating a ship is still called
sailing even though the ship is powered by a motor!
There's no reason to assume people will stop saying "
firing on all cylinders", "
step on the gas", or using terms like
turbo,
turbocharger, or
supercharger anytime soon. In fact...the Tesla fast charging network is called the
Supercharger network even though that's a borrowed term!
Supercharger - Wikipedia
Anyone who has used Microsoft Office today still knows what the save icon looks like. It's this:
What the hell is this? No one has seen a floppy disk in decades. Yet the icon used for Save will never change, even though what it actually is will be forgotten in living memory someday. Why change an icon which is, well, iconic?