Often. Often missed though.

Almost every component of a game is built on the premise of leaky abstractions that go unnoticed. Texture compression, lighting techniques, physics, audio filters, network latency filters.

There are other uses of 3D than games. 3D Engine != Game engine.

Try building a space game at real-world scale on 32 bit floats. Star Citizen tore apart Cryengine to make it have 64 bit positioning for this very reason.

Kerbal Space Program manages it.

(by moving the world around the origin)

Yeah in singleplayer with lower fidelity that is passable.