I clicked disagree (not dislike by the way). I don't agree that Tesla makes "models", rather, their production changes elements of the car constantly, daily, in a iterative agile cycle more like computer companies do.
Example : My "classic" 85 doesn't have power folding mirrors, those were added on the production line a few months after my very early car was produced. No one would claim my old 85 is the "same model" as a newer 85 with many more features.
Logically, owners of 75's saved money not getting the 90 which had the better performance because the $AVING$ was more important than the better range and much better performance.
Be happy with your choice. You made that choice. Tesla didn't force you to save that money on the upgrade, they gave you options, you picked one, and must have been happy enough to click purchase on what is already a premium priced vehicle.