We are leasing it because EV technology is developing so fast right now that by the time the lease is up, it’s likely to be way behind the times.
This is something that gets mentioned a fair bit, but outside of specific brands who have lagged behind (Toyota and Nissan come to mind), I'm not sure it's generally true industry wide. Your car, for example, is not markedly different than the model that was released in 2022.
- The software is better, but they could backport it and choose not to for business reasons.
- The battery is larger, but the chemistry is similar and it charges near the same speed (class-leading).
- The range gain from that battery is unlikely to change the way or rate at which you travel.
- It didn't get any more efficient.
This is not to say improvements can't or won't happen, but the the relative simplicity of electrive drivetrains seems to mean that most of the levers have been pulled and the technologies are mature. Electric motors have been around forever. It's really batteries where we hope for a breakthrough, but in the meantime they get just a little better each year.
I have a '22 EV6 and, frankly, I don't know what I'd get today that would feel like 4 years of technology advancement (outside infotainment). Certainly not in this price category!
(I'm not criticizing your lease, BTW, you probably got a screaming deal and depreciation has been a killer on these cars.)