The base car will have a low cost of entry, yet you will be able to add or unlock features later on via software purchases. Don't want autopilot at first, no problem. Change your mind a year later, no problem, Tesla will unlock the feature for a fee. Tesla just developed a revenue stream within the aftermarket sector. Pretty cool. It makes sense to manufacture one platform then if someone wants the additional features they can pay for them later on. Pure speculation on my part.