[tbabej]

It's important to note here that the current gate-based quantum processors also suffer from the connectivity problems. It's not just annealers suffering.

In those architectures, the limited connectivity enforces usage of SWAP gates, which increases the circuit depth.

Circuit depth, with imperfect qubits and gates, is currently the limiting factor - we don't have practical error-correction for the chips of today's size. Hence one can only perform a certain number of operations before his computation decoheres and becomes useless.