As far as I know, all of them need to be updated. Mine did, which I got with my new Tesla approx 3 weeks ago. You only see the reduced 8A while it is charging, and then when updated, 10A. It updated fine with my car (Model Y), just won't with a Model 3 Highland.
If you have a Highland car, it's worth bringing in with you to Tesla when you pick up your car to get it updated (or they give you another one that is already updated).