I think the real purpose of the BRO was to help Tesla get some cash at a time when they really needed it. It also had the goal boosting customer confidence that there would a replacement battery option down the line. Tesla probably knew they'd likely lose money on the deal, but on the other hand, they won the bet of still being in business.The pertinent point in that article is :
Tesla apparently is betting that automated battery production techniques will have improved, and raw material costs fallen, to the point that it can provide you a replacement pack then for $12K now and at least break even.
This clearly isn't the case, the packs are still hand assembled, and the cells are not materially cheaper (in compatible form). If a 80kWh pack including labour is $29k, a $55kWh is still likely to be the wrong side of $20k The more labour makes up the cost, the worse the problem becomes (assuming like for like kWh / $ between the packs)
Effectively Tesla have lost this bet, are going to lose money on every BRO.
Obligatory BRO pic: