There is a free lunch, just not necessarily for you
Multiple scenarios are possible. For example (example ok?!):
- Buy model X outright 1 year ago (minimizes interest expenses), in 4 years warranty runs out, the car is a liability due to expensive constantly required service, which contributes to terrible depreciation and the car is worth say $10k costs you increasing amount of money for every mile you keep it.
- The car becomes a collectors item/instaclassic and there was barely any depreciation
- the depreciation is sort of normal for the class
Basically if you don't plan to keep the car long term - lease is a (somewhat pricey in case of Tesla) insurance against the car losing too much value (and Tesla no longer offers buyback guaranties).
If you do hold your cars for a long time - then you bear all the risk of the car becoming a money pit yourself and model X in its current state has way too many inherent unfixed problems still to present a significant risk in this regard.