Changes to Models S and X allow them to travel longer without larger batteries
This "continuous deployment" for cars must be a logistical nightmare.  To do repairs for a given vehicle, keeping track of what parts are backward compatible would be challenging.  What if it's a compatibility breaking change?  Then keeping inventory for older cars would become problematic.<p>Unless they do design with maximum compatibility.  Then it gets interesting as upgrades are possible.<p>While B.EV cars maintenance is low, my car 7 months into ownership revealed bad battery cells that needed replacing.  If the car was say five years old, would this replacement have been possible?