I'm not clued up on basses to any great degree, but my Hofner guitars (and bass, come to think of it...) are over fifty years old. Why did I choose them, at the time of acquisition, over the 'new' equivalent..? Basically, price. The 'vintage' Verithin I bought for £250. The modern, very excellent Verythin (in some ways a superior instrument, I'll allow...) is well over £2500. If I had the money, would I buy the newer one..? Yes, I would, but if I had that sort of money, I'd buy the 'vintage' one as well..! Why..? Maybe in absolute quality terms, as an item, the new one is 'better', but my memories of learning to play guitar, listening to the '50s, '60s and '70s bands, have tuned my (now cloth ...) ears to 'that' sound. I've more modern electric guitars (and basses...), but 'my' music comes from the instruments I grew up with and loved at the time. Same with drums; my kit is from the '60s. Is it good..? Yes. Would I swap it for a new DW kit..? Not for a fortune, despite the absolute qualities of the latter. So, nostalgia..? Partly, surely. Mostly, though, because I find that my old, worn slippers bring me much more comfort that a new pair. Old dogs, and all that..?
Just my tuppence-worth.