I wondered earlier this too and asked NSC back in 2019. I took the consensus response of the undoubted cognoscenti to be that it was better to use the already created car until the end of its working life rather than cause more use of raw materials and more GHG emission inherent in the...
"SUVs and 4x4s are a disaster for our health, our public safety and our climate"
Hard to disagree with this statement. The Chelsea Tractor is a completely egregious vanity item esp in urban areas.
Meanwhile re petrol vs electric and life cycle carbon impact, BBC R4's More or Less investigated...
https://www.bbc.co.uk/news/uk-england-london-60660711
http://tyreextinguishers.com/why-are-you-doing-this
What does NSC think? Deflating the tyres of SUVs.