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They mostly are, companies don’t care to innovate anymore, only to sell.
Safety? Some, sure. Pollution? The only reason governments regulate is because car companies want to sell you a new car every year. Ooops, big bad government whom we happen to have in our pocket wants Euro5 now…
More weight/size = more raw materials, is it really that good for the environment?
If companies and governments are so keep on being green (they’re not) they’d ensure cars are easily repairable and upgradable. And they’d keep supporting older models - design a more efficient engine to replace the one in the older car why won’t they?
If a vehicle doubles in size, vastly improves performance, and still has similar efficiency, yes, that’s a win. If it improves safety enough to save tens of thousands of lives every year, yes it’s worth it.