They've just refreshed their Model 3 and Model Y within the last year or so. With the model Y looking considerably different so I'm not sure where you got that from

I can give you the Model Y but take a look at the rest of the lineup compared to when they were first released. Hell, you're in this very post calling the S/X old.

And yet absolutely no under the hood stats have changed in 8 years - battery capacity, charging rate, charging curve, performance