In 2016, Tesla Motors introduced the Tesla Model S with the 60 kWh battery pack as a more affordable option for all its customers, and to ease the adoption of an electric vehicle.
However, almost all the customers ended up by ordering the Tesla Model S with the 75 kWh battery pack, so Tesla decided today to simplify the ordering process for all the customers and remove the 60 kWh option from their lineup.
For the customers that still want to own a Tesla Model S with the 60 kWh battery pack, Tesla keeps the option available by April 16, 2017.
At the same time, any client that ordered the Model S with the 60 kWh battery pack will have the ability to upgrade their battery pack to the 75 kWh option via an over the air update.
If you want to own the most affordable version of Tesla Model S, you can order it by April 16, 2017, after that date the most affordable Tesla Model S will become the 75 and the 75D.