That analogy doesn't fit. If my Les Paul was giving me half as much trouble as your hypothetical 57 Bel Air it would be gone in a second and something else would take it's place.
But it doesn't give me any problems at all.
In all 192 shows I played with it last year I never once had a situation where something about it was bothering me or not working the way I wanted it to. I never once had any frustration with it, and never once thought I wish I had something else. It just worked.
I don't find myself feeling a need for anything on it to be changed, or fixed, or updated, or improved. If I did, I would get rid of it and get something that worked better for me.
It has nothing to do with it being cool, or vintage, or traditional. It has nothing to do with fearing change, it has nothing to do with what any other guitarist besides me has ever used. It's a tool I have, and it works.
So why should I give up a tool that does everything I need just because it happens to be traditional and there are other modern alternatives available?
I can think of a huge list of reasons to trade a 57 Bel Air for a 2023 Hyundai, because there are a ton of practical considerations there. But I can't think of a single reason to trade my Gibson for anything else.