Wasn't there a quote somewhere early on where KF jumps used to be less than 30LY.
I swear I read that somewhere. That early jumps were only capable of like 10LY.
The 30LY figure is only the current max of a "safe" jump.
We also have 2 examples of 40 & 50 LY prototype drives in use with the Manassas & IU? drives that didn't burn out the core but had some other issues IIRC.
So I'd say the "Super-Jump" is a matter of "When" do we advance the KF tech to a new milestone achievement.
Like coming up with an IS produced Clan ERLL, they just need to refine the 40/50 LY tech to get it working safely.
That's true, you might be thinking of Interstellar Operations and ships like Aquilla class primitive JumpShip. However, JumpShip technology has stagnated in the BTU for centuries. Since the Age of War, the boundaries of K-F technology have not been pushed further out, the exception being HPG devices. No information has been given, as far as I know, on early HPG transmitters and the developments regarding their distances.
My theory would be that early HPGs started at a 30 ly range, since anything under 30 ly would yield no benefit to developing courier JumpShips. The question remains though, where HPG theory forked off from K-F-drive theory.
It's interesting to see, though, that in the BTU K-F-drives and HPG transmitters become more efficient at some point, i. e. they can be build much smaller, but they not more effective, meaning their range maxima stay constant. That seems rather odd, since usually being able to build something smaller means one has mastered its power, too. By analogy, that would be like microchip processors being build on ever smaller circuit boards, but not being able to build computers that can do more calculations per microsecond. These technological boundaries do exist for certain spans of time, yes, but usually they are solved within a couple of years and can temporarily be circumvented by adding processor cores and enhancing clocking speed.
For K-F technology, no such circumvention seems to exist, not even during the heydays of the Star League. That suggests a rather hard limit, probably due to the nature of hyperspace. Unless one finds a new way to look at the problem, which is WoB scientists might have done.