Looks like the Raiders are now more of a logistical challenge rather than an existential threat.
But logistics is life. Therefore...
Yes, the empire now out-techs them, and their military ships can outrun all of the raiders, so they aren't a major threat any more. However, they are damned annoying. And I must admit, when I realized they were raiding in uninhabited and unexploited systems it caused more than a little unease, as they were completely undefended. Fortunately, there was only one such system that was a critical problem, however, there are several others that could be a lessor problem in the future, particularly if expansion continues.
With High Guard station established in the solar system, close to the jump point, there are now naval forces stationed there that can rapidly respond to most of the nearby systems in a reasonable amount of time without having to climb out of the inner system.