Also keep in mind Tesla technically already did a somewhat refresh, like a generation 1.5 of sorts in 2016 [1] (New seats, slight interior changes, facelift, autopilot updates).
1. https://www.autoblog.com/photos/2017-tesla-model-s-facelift-...
For a lot of people outside the Bay Area, a Model S still feels like a design revelation, not old hat.
I am impressed that they can do stuff like that, but they are also kinda big....
But if you want a drivers car, Tesla is not currently in that market. I look forward to seeing someone serve that market. Maybe BMW will try to live up to their motto again.
Adding IRS was pretty significant though.
* To be fair, both Mustang GT and Camaro SS are objectively not inexpensive cars except when you compare them to other cars of similar performance.
I think existing owners would already understand that their cars are iteratively improved upon and that a Model S purchased in 2019 is going to be a lot better than one they purchased in 2013.