I’ve heard plenty of full range speakers. Voxativ, Cube Audio, Lowther, and plenty more.
And yes, they do some things very well. But they trade off way too much to be completely satisfying, for me.
Maybe if I had enough money to have a second system, just for listening to chamber music, and acoustic jazz (like most of what is released on the ECM label), I would own a some FR speakers.
But I listen to much more music that requires substantially lower bass, dynamics, and more detail in the upper frequencies. Modern, avant-garde and contemporary orchestral classical music, intense jazz and electric jazz, and various forms of intense progressive music.
For me, I would be losing a lot more fidelity, by only having a pair of FR speakers, than I would be gaining from them.