It depends upon what you're seeking in music reproduction. As a group vintage loudspeakers won't give as much detail, soundstage/imaging info, air and low frequency impact as better quality modern loudspeakers. What some vintage loudspeakers can do is give an excellent sense of music being performed by musicians. The best modern loudspeakers can give you everything, but many lesser modern loudspeakers are missing the music/musician quality. They get the sound right, but are lacking that it factor. If you're the type of audiophile who measures how far outside the left speaker the soundstage extends, then I suspect vintage won't make you happy. But if you really enjoy the interaction of Paul Chambers and Joe Jones...
Can speakers of a certain high caliber can ....
can be bested by all these new guys saying they had a speaker that better than what's available. It is getting harder to believe. My own could use a good updating, but that's a singular instance. People still shell out money for golden age speaker's like the JBL Hartsfield. Admmitedly There is a collector element that plays a role in that