>'There's a small market for converting vintage cars to EVs. The cars are already unsafe, so it's a way for enthusiasts to save a car's body long after the drivetrain has failed'

This is wildly inaccurate. There was a trend for a few people customizing popular classic cars into electric drivetrains. The reality is any desirable VW Beetle, Porsche, Jaguar etc has a huge parts aftermarket for full restoration back to 'brand new' originality. Converting a classic car to be electric typically devalues it (classic cars are an asset class).

The challenge when putting heavy batteries in an older vehicle that was designed for a heavy engine at the front or back is that it changes the suspension, steering and handling characteristics, while the extremely rapid acceleration possible with any electric vehicle means the braking system design may need to be radically altered. We see way too many 'aesthetic' conversions of classic cars that are beautiful death traps in the hot rod world, and now in the EV bodge up world too.