I regularly drive 450+ miles to a family camp and need to stop at least once just to stretch my legs/change drivers/eat. The drive can take anywhere from 7-9 hours depending on traffic. 900 miles range is cool but it's not worth a huge price premium. Sort of like the Concord; while it's technically possible it's not worth the money.

The extra range seems to mostly come from big increases in aerodynamic efficiency rather than just jamming a huge battery into the chassis so I'm not sure it would demand a huge premium, at least not because of the BOM.