The lifespan of EV's is probably akin to an iPad. Longer than an iPhone, but really a 5-10 year item. I don't see them being viable for longer road trips after year 5 given that folks are already seeing 10-12% range loss after a few years. I think a lot of people still forget that time kills batteries more so than mileage, so these 100K reviews after 2 years are not of much value. The issue is that these cars are only good for 150-200 miles between charges as-is (10-80% SOC usage) under "normal speeds," so a loss of 10-20% can make them go from being "ok" long trip cars to intolerable.
Tesla only warranties for 70% of capacity after 8/100K, after all.
Some degrade substantially quicker.
Batteries get it from all sides -time and cycles/ cycle depth.
I'm pretty confident that a replacement 4680 pack will come down substantially 5 years from now everything else from everyone else - not so sure, but Im not going to save much starting with a 50-60K car.