The old Chevy Sparks are basically golf carts with 4 doors and permission to drive in the roads. They are the least “techy” EVs I’ve seen in person as they are really just a battery swap with the minimally-appointed ICE version of the car, which is very sparse on the electronic doodads.
I don’t know about the disposal of rubber, but the production of rubber has historically enslaved and destroyed entire populations and environmentally wrecked whole regions of the earth in Africa and South America…