Quantum annealers (like DWave) can solve optimization problems efficiently. But they can’t run general quantum algorithms such as Shor’s algorithm, that requires a general quantum computer (like what IBM and Google are doing).
did it reach the point where it can do any useful work faster than standard computer? Last time I read about it it was something stupid like "It can simulate its own noise"
can possibly solve some (but without any guarantees on which or if any actually exist)