Tesla is one of those cars which gets BETTER with time. I have a 2018 Model 3, it is a MUCH better car than it was 3 years back. Not just cosmetic changes, they UPGRADED my CPU to handle more advance calculations (for free), constant software updates to make it better every 2 weeks. I reminds me of iOS updates, but more frequent & more consequential (added features which let me monitor the parking lot remotely/visually before reaching the car etc)

Our Battery packs are good for 400,000-1million miles depending on model. What more could u ask for? 420,000 mile? 1.1m miles? The point is, it is already as good as it gets as of TODAY, future efficiencies will always be there. But that is out in the future. Also, these are MANUFACTURING efficiencies , the end result for consumer is same/almost same.

I was an exclusive BMW driver for 15 years before moved to Model 3 - I enjoy every bit of it. Never ever had buyers remorse.