And also for silicon budget, probably: short distances require small interface transistors and thin wires compared to massive distances like 5cm. The chip are

And also for silicon budget, probably: short distances require small interface transistors and thin wires compared to massive distances like 5cm. The chip area can be re-used for compute-sized transistors and wires (much, much smaller than interface transistors and wires, so there can be many more of them).