The lineup has been getting a little jumbled as Tesla introduces more efficient and refined versions of the Model S. The 70 models were a replacement for the older 60kWh vehicles and the 90 series is effectively the same for the 85 vehicles. In the UK, customers have had the option to upgrade their 85 to a 90 for more range and performance -- Tesla says most people took up this offer, which is why it decided to pull the 85 line altogether. In other words, this is just a little bit of spring cleaning.