It won't likely perform better as it ages but it may continue out-performing a fleet that tends to hold its value. If the maintenance cost of the electric motors and batteries along with the turbines operating at reduced power is better than the maintenance cost of two turbines that are operated at 100% power to take off, it could really pay off, as that tends to be a very expensive part of the operation. Airframes also often appreciate these days, as it is very expensive to buy a new one and an old one is somewhat proven.

This plane basically has to outperform a Saab 340.

That made me double take too, but he must be talking about the software getting better, and thus higher value.

Better battery tech ?

If Teslas could be appreciating assets [0], why not electric planes? /s

If anything, planes have real autopilots!

[0]: https://www.businessinsider.com/musks-claim-teslas-appreciat...