Really depends on the supplier and importer but if moving a ton of cases they always end up on a container and there are lots of steps between getting off the boat and actually getting to a restaurant or wine shop.

Have to get through customs, get transported/unloaded into a distributors warehouse, picked/packed in the warehouse to be loaded onto the box truck for delivery. Very rare climate can be controlled through all these steps

Really high end wine will typically be shipped in smaller quantities and be sent via air freight to avoid this