I held my previous car for ~ ten years (Subaru WRX) and intended to hold the Model S that replaced it for 15. Alas, when the option of all-wheel (dual motor) became available I did sell it to a friend and upgraded. Based on the data from the Tesla Roadsters, they hold up fairly well after years (mechanically impeccable due to few moving parts). Early data from the now ~ 7 year old Model S suggests that it's even better. I known nothing about non-Teslas, but IMhO, Tesla sets the standard that all EVs should aspire to.