At 26,000 miles I had the first ever tire rotation on my 70D.
The front two tires were worn down to 7/32.
The left rear was at 6/32.
The right rear was at 5/32.
The tires were not rotated at my first annual service (12,500 miles) because Tesla said all tires were evenly worn.
I asked the sevice advisor why the right rear was worn so much. He claimed that the right rear is where the most power is applied.