For me ,it would be about being able to hold on to my landcruiser, kept last one twelve years so I wouldn't mind spending a fair amount to convert as even the biggest EV is small compared to what I have.
Obviously broadly speaking, not scrapping all the metal out there is good for the environment, probably true that if governments wanted it to happen, we'd have seen conversion emerge on scale ,I suppose they want the tax revenue that new cars provide and EU governments are lobbied hard by the big car companies so may just be a mostly DIY exercise for now