I'm with you on the whole hatch thing. I would have preferred the same hatch size as Model S, matter of fact I was counting on it.
But obviously Tesla made a decision that the rear glass window size was more important and for whatever reason had to make it fixed. So Model 3 has a trunk.
Am I disappointed? Sure, but I can live it. I have had sedans before and not being able to potentially carry a sheet of plywood or taking my pet elephant for a ride wasn't a big deal. I just rented a truck when Dumbo had a hankering for a bag a peanuts. That's a joke, not a dig at your dog. I'm sure he's very nice