Not only can the battery packs be rebuilt they are also capable of being recycled.There’s a Canuck company that’s now recycles lithium batteries,something close to 95% of the materials are recycled and turned into new products and batteries.
As for recharge times well with regulations on how many hours a driver can drive without a rest stop it becomes moot. 500miles is very close to or over the limit of hours a driver can do.
In Ontario a driver can’t drive more than 13 hours in a day so I guess that’s about 780 miles,let’s call it 800 so 1 stop to eat/rest and relive while it recharges seems a reasonable thing to do.
Now brakes and tires will be the biggest cost on using an EV semi, or close to it.