Totally agree, (Although not a deal breaker for me) I’m sure a sliding rear window can be added via 3rd party at some point.The real deal breaker for me will be the "fixed" rear window.
Paying a lot of money and not being able to remotely open the rear window by the bed just does not work.
You can slide things through but also be able to get some ventilation.
I really want to get this vehicle but, yes, a little thing like that would really need to be explained as to why it cannot be done.
But agree that with such a small bed it’s almost always necessary to have a back window to pass a 2x4” or a rug or something through.