Yeah, but I personally find it annoying to have to spawn a ship, get in it, go to your destination, get out, then have to delete the core, all just for regular transportation. Plus gravity elevators require a 7x7 wide shaft and are mostly empty except at the bottom, so you could still fly a core down there if need be. And I wonder if gravity might possibly be faster than a core (no idea actually; testing would need to be done).
And actually, the absolute fastest method of transportation is teleporting, easily achievable by entering a docked core and pressing left or right arrow keys to move to another docked core and getting out. Now, previously, doing this had the issue of you possibly going into one of your turrets and turning off the AI, but, since the current build introduced chain-docking, I believe there is better way.
If you just docked a teleport system ship inside your ship, you could teleport to any core docked on the system with no worry of accidentally going into a turret or another docked ship (unless you placed the ship dock on the teleport system platform). Now, your teleporters could only be placed in straight lines since docking areas can only be made in box shapes, but this means you don't have to have directions near the teleporter which way you'll go when pressing the arrow keys (since it can get very confusing otherwise). Or you could just build your whole interior on the teleport system, then put engines and shields on it to make it a giant escape pod. Then make your teleport pads (the docked ships you travel between) into smaller escape pods. It's double redundancy and it will confuse your enemy.