Not really (at least not on 'commodity' CPUs). It is still an active (and very interesting) area of research. There is a lot of work going on into both attacks

Not really (at least not on 'commodity' CPUs). It is still an active (and very interesting) area of research. There is a lot of work going on into both attacks and practical defenses for this kind of stuff. Whether it is truly solvable in practical settings remains unclear. I do believe it raises the bar enough for it to be useful in many scenarios though.