Reactions to the 5.8 upgrade seems to have highlighted the fact that Tesla reserves the right to reach through the aether and reconfigure your car. Some owners have only recently understood the full implication of this and are (understandably) upset when a particular upgrade changes a favourite feature. The real upset has been the lack of warning/PR stumbles/is the new version as intended or is it a bug/etc, but the condition above still applies. It is something which both company and fans need to emphasise to prospective buyers: Maybe tee-shirts could be involved. "Tesla is a company of engineers who will continue to modify your car for the life of the vehicle." "Tesla - cars can always be improved, so we keep building them - even after you buy them" "Tesla - What will your car do today?" "Tesla - The car we build today is better than the one we built yesterday" "Tesla - where engineers never sleep" "Tesla - you do the driving, we do the engineering. Deal?" "Tesla - yes, the customer is always right - but we think that the customer really needs to be a bit more open-minded and try THIS" "Tesla - where the manufacturing doesn't end just because the finished car left the plant." "Tesla - real engineers love to tinker - get used to it."