Hi!, I am not currently an owner of a Tesla vehicle but I am looking into possibly buying one one day. I have been watching a lot of videos on YouTube regarding different aspects of ownership from the viewpoint of many owners and I was wondering one thing. Does anybody know or have information on what the life span and cost of replacement is for a Tesla battery pack. I have heard that there is an 8-year 100,000 mile warranty on it that Tesla offers but it isn't clear to me from the videos I've seen what the potential future replacement cost of the battery pack might be? Yesterday, I walked into the local Tesla store located in the Boca Town Center square mall here in Boca Raton, FL. and briefly spoke with a sales floor associate who informed me that the current replacement cost was $15,000 to replace the pack and that it was designed to last 20 years with the idea being that you would buy a new vehicle before you would need to replace your battery pack. He also said that this price was not likely to be reduced over time because as he put it 'it was a technology thing rather than a production thing'. Can anybody confirm this for me? What has been your experience? Thank you in advance for any information any of you can provide me with regarding this issue.