That's not irrational, assuming I'm interpreting the parent comment correctly: If 40 kWh car is really a "locked" 60 kWh that allows modders to unlock the remaining 20 kWh, then it's entirely reasonable to be pissed off if one bought the more expensive model. After all, one could saved a lot of money by buying the much cheaper 40 kWh model and unlocked it.
From the point of view of the 60KWh customers, they're still getting the same product for the same price that they agreed - so if the product was worth it to them at that price before, it should still be, regardless if some other customers are getting a greater surplus. Other people getting a good deal doesn't affect your utility.
This is so even if they were just shipping the 60KWh model as-is to those lucky 40KWh customers.
Yes, except the 40 kWh customers are essentially getting a rebate ("20 extra kWh" for free). The 60 kWh-ers may reasonably ask why they don't should not deserve a similar rebate (eg., free upgrade to 80 kWh), especially considering they paid more for the product than the 40 kWh-ers.
Note that I'm agreeing that it's nothing to get angry about (and we don't know whether this is something that can be "unlocked"), but I disagree that it's some kind quirky human, irrational response. On the contrary, it's completely rational; it's rational to recognize when something is distributed inequally in a way that favours some people out of sheer luck.
