Likely only those who have inherited a car full of ‘band-aid’ fixes, and care about history.
 Sure, when it comes to safety issues, no one want to take unnecessary risks. But, where do we draw the line?  Should we all rip out our steering columns and install modern collapsible units with airbags?  Phill needs an electric fan.  Was that the traditional remedy for a car that overheats? If I remember correctly (?), Henry was a proponent of positive ground electrical systems.  Of course, he was just a senile old man (who only happened to have put the country on wheels), and when GM went 12V/neg grd., by then his ‘know-it-all’ grandson was running things.  But then, Henry wanted to keep making the model T. (which by now, would likely cost less than the gas needed to fill my expensive SUV😁).  Just saying.  Everything in perspective.  The big $ spent now at vintage car auctions are for ‘resto-mods” (likely none that still have Y-Block engines). That’s the way to go if you want a car that only looks vintage, but has all the conveniences & reliability of modern vehicles.  12V conversion offers many advantages (electronic ignition/sophisticated stereo systems/computerized fuel injection/etc.,etc.).  I just happen to think it shouldn’t be the ‘knee-jerk’ fix for everyone who acquires an old car that was improperly maintained. Kids in the 50s seldom kept their cars stock, and along with mag wheels, body customizing, speed equipment, etc., a 12V conversion would have probably been in order,  ‘I’ have blue-dot taillights, an aftermarket dual-point mod. & glasspacks, so I’m no purist.  I wouldn’t go back to bias tires, wet batteries, or non-detergent motor oil for the sake of ‘originality’ either.  Some people just get satisfaction from making old things work as designed, and want others to know that it’s still quite possible. It may be more work than the ‘band-aid’ (I AM sick of rebuilding generators), but possibly rewarding nonetheless.