I think "marketing" is being mistaken to be "new technology". If you deduct what marketing tells you to be an improvement, you will not wonder anymore why Genelec is still among the best. Titane, Alluminum, Berillium, all do not matter, if you have room problems. In the end 20KHz are 20 KHz and you will be lucky, if at higher age you can still hear them
(which raises the question why people have super tweeters up to 100Khz, but no master grade studio monitor, although of course I do not know all studio brands)
In the past passive high end speakers were tuned to meet a certain room of unknown properties, to have a certain "sound". Studio monitors never worked in such normal rooms, as only very few understood that full linear speakers need a tuned room to work or if they have switches to adapt them, how to use them properly. Hence we got that nice argument, that studio montors are too bright. No, they are just linear.
Nowadays we have tuned rooms and we finally get high end speakers without a "tuned sound". And many have finally understood the importance of a linear speaker and that the room needs to follow.
The active designs also inherit alot of benefits that still give such "old designs" quite an advantage. From high quality low signal level active x-overs instead of huge complicated passive designs that look more like art when nailed on a wood panel, to various amps controlling directly the driver in an active design (dampening factor of the amp) and no x-over in the path (each "way" can get its dedicated and specialised amp).
It is actually more of the fact that these designs are so good that not many people like to sell them. Retailers will not make the turn arounds so quickly as with an established high end brand that has every two years a new flag ship out. And it is much sexier to sell separates as well. Make twice the stash.
So stop to wonder....