What if running some of them is actually more efficient than tearing them all down in terms of environmental costs/industrial throughput given the fact that smelting and recycling metals has an environmental cost in itself? Can I keep my 5 seat wagon with 2 rear facing jump seats in the cargo area that have seatbelts but are technically illegal because the trunk doesn't have a way to open it from the inside? It doesn't even get good mileage but it's a people hauler.
Repurposing existing cars would make sense if there was no alternative. Obviously in reality certain areas can't go without cars, and heavy machinery like forklifts can't really be replaced.
Yeah it's kinda ironic I think the combis and small transports that so many people rely on in car centric latinoamerica are a category that would benefit especially well from electrification & replacement with rail, both would improve many peoples' quality of life but fossil fuel companies benefit from nobody moving away from them outside of the first world.