100k isn't all that many for a modern used car and that's a pretty sizable hit on the range given that it's by far the biggest limitation of an EV. Given those numbers it's reasonable that a used Tesla with say 125k miles might not be able to do a 150 mile round trip on a full battery. That's a pretty big limitation for some people.

You're going off the minimum for a warranty replacement, which is pessimistic. Most Teslas with 125K miles have not lost anywhere even close to 30% of the capacity. Typical will be more like 15% or a bit less. And even less than that for the LFP cars, IIRC.

Some cars I expect to do much better, due to manufacturer decisions. Ford, for example, put a pretty big battery in my Lightning, and then made the top 10kWh or so unusable. So far, this means that Lightnings with 100K miles (there aren't a huge number of them yet, but they do exist) often have 0 apparent degradation, or very low single digits.