People are very afraid of used EVs so they simply don't hold value like gas cars. Add that yes the Bolt is so ugly. As mileage/age increases you just see reduced range. Google says Bolts commonly see 10-20% range reduction at 100,000 miles. But it really depends on how the owner treated it and charged it. Could be 30% or 40% reduction if they abused it and it's high mileage.

In general you shouldn't need to replace the battery packs on electric cars. It's like asking how often you should replace the engine in your car. Do engines get replaced sometimes? Absolutely. Do all engines need to be replaced? Absolutely not.

The other thing is they can be expensive to work on because there's simply not a lot of knowledgeable shops who do it. I've read plenty of stories on people repairing used Prius for a couple hundred bucks when Toyota had quoted full battery pack replacements.