I'm not fully set on vintage drivers; I am open to other technology.
I have, however, had great results with vintage full rangers that I have not gotten through modern speakers: largely due to cost restrictions.
Vintage drivers can provide a lower cost option for higher quality (too a point). As well, I do enjoy the pursuit of finding 'the right' vintage components for a project. This is a just a hobby for me.
I am also not trying to build the perfect speaker that will last forever... I enjoy trying different drivers just for the fun of it. Again, vintage drivers provide a lower cost point for owning multiple drivers.
All that being said, some of them are really dogs, and I am open to other people's opinions and previous experiences to avoid chasing my tail.