1- it will be activated in a future update. Tesla has already confirmed this with buyers at delivery or during the order/delivery process.
2- not likely to have a reason for the equipment to be different than the S/X adaptor if the Supercharger DC plug works the same between all, why wouldn't the ChaDeMo?
3- see #1
Trust you mean whether the ChadeMo adapter works on the 3? Can’t remember any current owner mentioning it.
Having just talked to the T≡SLA rep in the SW after I bought Red Dragon, found out the adapter costs over €500 which is a bit excessive for me.
With the ever expanding SC network in Europe and my Wall connector at home, I’d rather try to survive without...