If a " system " cannot do this, I move on........

What I think you're speaking of is what I call immediacy, this is what I'd describe as sense of performers in room. First time I heard this was with my first 845 SET amp some years ago. But it was only after hearing my 845, 300B SET's with stock Klipshcorns this sense was heightened to the point I knew somehow I had to keep Klipshorns.

And so, in spite of sound quality defects I heard with the Klipschorns vs. previous speakers, I proceeded to modify the Klipschorns to my liking. On to today, my Klipschorns deliver this immediacy without prior defects. Other wonderful aspects of my  horns (and stock Klipschorns) include extremely high resolution,  without this one can't hear that sense of real live performers in room. Microdynamics, also allied to resolution, but which is as much a function of other equipment in system; horns can expose this ability to it's fullest.

Part of what allows this performance is minimalist crossovers in horns, which helps to create high efficiency, which in turn allows minimalist amps such as SET. Much less stands between source and what comes out of speaker.

The above qualities, in concert allow engagement with real live performers in room  with every listening session. My horns are the final solution for speakers in my quest for  end game system.

Sounds like you're obtaining similar engagement with your horns, you get the magic of horns.

To expound a bit on listener perspective.

Your are there, the sense you're transported to studio or recording venue.

The performers are here, the sense of the studio being brought into your listening room.

The performers are here, the sense of performers actually in your room, not even the studio stands between you and performers. Yes, you hear artifacts of recording venue, but the window has more sense of being non-existent. This is what proper horn setup should create for you.

Well, if all you heard was wall of sound quality with horns, you've never heard a good horn setup. Yes, they can be what Artemus describes, but in sympathetic setup, and with proper mods for some, they do what they do in special way, Proper timbre, tonality, imaging and sound staging are all attainable. They can be subtle and sublime when called for, and they can be edgy, fast, responsive when called for.

Blanket statements should have wet blanket thrown over them.

I can only say not all horns created equal, so blanket statements not credible unless all have been heard in one's own system. Yes, they do have this overall gestalt, what I call immediacy, but in your face, not. This immediacy does require extreme attention paid to sound qualities such as timbre, tonality, otherwise in your face sound quality may dominate.

My solution has been diy to a large degree, only my bass bin remains as stock. Many others also have modified their Klipsch horns, plenty of vendors to choose from. which goes to show in stock form they leave something to be desired.

My only contention is horns are capable of NOT having all the liabilities some detractors claim ALL horns have. I'm sure plenty of modded Klpsch and perhaps non-modded Klipsch, and horns from other makers don't have the entirety of liabilities some claim them to have.

My other speakers are Merlin VSM-MM, all Duelund VSF caps in BAM and crossover, Texas Component TX2575 z foil resistors, upgrades voltage regulators, blah, blah, blah. Totally different kind of speaker, anything but in your face quality, my Klipschorns no more in your face than the Merlins. The immediacy I'm talking about comes from partnering equipment as much as speakers. Been there with the in your face with my Klipschorns in stock form, metal horns anyone.

I understand horns not for everyone, but continuing blanket statements deserve wet blanket. Quality crossover parts and design  tractrix horns manufactured with quality materials such as birch ply, quality drivers,  along with sympathetic partnering equipment and room treatments  can bring wonderful presentation of performers into one's home.