Best thing for consumers and environmental would be conversion. We already have the cars. I like my 2003 Golf. I won't be getting rid of it until I need to.
Why replace 8 billion cars when we can convert them. Yeah they won't be nearly as efficient but it's a stop gap between scrapping that many cars. Also I can't afford a new ev. I need a small run around with 259 miles.
I have had a handful of that generation golf over the years that I have modified. It would be absurdly simple to drop an electric motor into that thing if the right kit existed.
The kits do exist. But I think they are pretty awful. Like maybe less than 100 miles. Our car is incredibly heavy so it might get even less. Once we get stupid good range and the price comes down.
Then we are talking. But will the world actually allow us to wean ourselves of fossil fuels. Every car company and conglomerate doesn't want the poor to get access to cheap transportation.
Funny is that the way things have been going the last few years, if there's a kit for your car, it's probably based on parts from a crashed Tesla. Which is a good thing, IMO