I have, and do, and 'great' isn't the word that springs to mind. Speakers design hasn't improved one jot in terms of ultimate sound quality. In fact many expensive speakers, loaded with 'technology' don't sound as good as an old pair of Quad 57s.
Actually, to my ears, they don't sound as good as my 1934 Voigt Corner Horns.....
In terms of accuracy modern loudspeaker drive units are way better than old ones, the new technology for linear magnetic circuits, totally pistonic diaphragms and high power handling just did not exist in many old drive units, if any.
The Quad 57 sounds fantastic at low levels sitting in the right place, a bit louder or sit off axis and they do not.
It does beg the question, though, how good the speakers built with these fantastic drivers are. Weird tailored frequency responses proliferate in modern speakers IMHO. Goodness knows why.
Also many of us still love a bit of the euphonic colouration added by the imperfect kit, whether because we have become accustomed to it as the norm or just nostalgia. A bit too much fidelity is not always what we want to hear.