FWIW, I reached the same conclusion as @sundogplanets: continuing to drive my old Civic with good mileage <4000 mi/yr has a lower environmental impact than replacing it with an EV.
If — and it's a big if — but if I can shift enough of my transit needs to bike / public transit / sharing a car / rideshare that I •never• buy another car myself, then it’s not even close.
That took careful analysis; not clearly the best answer for everyone. Is there a good site out there where you can plug in individual numbers, I wonder? https://mastodon.social/@sundogplanets/113923576960069369