Just wait. In a few months, Tesla is going to have a metric crapton of used HW2 and HW2.5 boards, and absolutely nothing useful to do with them. Then, they'll have a choice: make all the HW1 users happy with a $5 adapter board and a tweaked single-camera summon mode on HW2.5 or find a way to dispose of all that hardware without the recycling gestapo making their lives miserable. I think we all know what they'll choose.
So how much do you suppose they'll get for all that silicon on the scrap market?