user1271772's answer is entirely correct. I was going to comment with additional information to help answer nippon's question, but I just created this account and apparently there's a reputation requirement before adding comments.
D-Wave's superconducting flux qubits are niobium metal loops that form a "hash symbol" made of two flat layers that have been stretched out and laid parallel. One layer is 90-degrees rotated from the other. When you move charge (current) in a loop it produces a magnetic field perpendicular to the plane of the loop. When you move a magnetic field through a charge-carrying loop it induces motion in the charge (current). But the amount of induction is partly determined by the size of the overlapping area (not linearly, since perfect overlap doesn't mean perfect induction, and non-overlapping adjacent wires still do it) so you can't currently usefully overlap 1000x1000 because the influence on each neighbor would be small. Stacking more layers is hard for the same reason wireless charging only just started to not suck.
The D-Wave uses Niobium loops interspersed with these amazing little quantum-permeable membrane slices called Josephson Junctions (that won their discoverer a Nobel before he went a little wacky) cooled to just above 0 kelvin, so they can hold a charge with zero resistance. Basic quantum computing hardware generally has to be robust to decoherence, which means it can't interact much with the outside environment (should be its own Hamiltonian). There's already a ton of control hardware and stuff that has to go into keeping it all stable. Every time they move the machine they have to recalibrate it (at least with the DW2) and a new random arrangement of like 90% of the qubits will work until it's calibrated again. So it's actually a harder problem than just fitting to a chimera graph. Needs to be a readily radiation-hardenable system of some kind, e.g. a neural network.