Because Wendy was looking at non-SUV cars. Bringing in SUVs is off topic per the OP.
Was she? I went back and looked at the OP, and there’s nothing there that specifies what type of car she was talking about.
Regardless, a Model 3 is a very different type of car than a Highlander - so that comparison doesn’t really tell you very much about the question that arose in this thread: whether the cost savings from EV’s compared to ICE’s makes supplementing an EV with an occasional ICE rental for long trips economically viable.
Having gone back and looked at Wendy’s initial post, I’m going to make a mostly unsubstantiated guess that it wouldn’t make sense for her. A plug-in hybrid might not make sense, either. Based entirely on her comment that her already-five-year-old-car will outlast her. Which suggests (at least to me) that Wendy isn’t going to be putting a ton of miles on any new car on a regular basis. And if you’re not putting that many miles on your car, you’re not going to get the fuel (and probably other) savings fast enough to justify the higher initial outlay, no matter what your time value of money is.**
How about it, Wendy? Would you mind sharing what you think your rough annual miles driven would be?
Albaby
** That’s why I don’t personally own an EV. I live close to virtually all of the destinations I travel to, and we have a larger second car for long-distance family road trips. But I put fewer than 6K miles on my car each year, so it makes very little sense for me to pay an EV premium that I’ll never get paid back.