Mine is on 20.4.2 and it hasn't received an update in a while, though I haven't been putting the wifi near the car at night.
For Vick, Tesla did indeed deliver some early SRs with SR+ window stickers on them or in the glovebox, and there are in fact federal laws governing those stickers. That may or may not have something to do with why Tesla has been hesitant to downgrade them. When the rebranded SR was first announced AP was not included on the SR+ or any model, you had to buy it for $3k. Shortly afterwards (maybe at the same time, can't remember) Tesla raised the price of the SR+ by $2000 and included AP; people who bought SR+s before the 2k price increase still have to purchase AP just like SR owners. AP was not listed on those stickers so Tesla is under no obligation to provide it.