With conventional vehicles, I would just note that dealers are independent businesses. A dealer orders a vehicle on the basis of what's selling on their lot. They're not told by an OEM or a manufacturer what they should be selling in what volumes. A dealer in Medicine Hat is going to have a different mix of vehicles than will a dealer in downtown Toronto, for example.
It's up to that independent business person to determine what the needs are in their community. They would therefore order the vehicles and finance those vehicles, and the intention would be to turn over those vehicles quickly so they would not be carrying a significant financing cost.
It really comes down to an individual dealer's decision on what they carry on their lot.