Many companies make all kinds of slide out drawers and trays for pickup beds. For example:
BEDSLIDE truck bed sliding drawer systems
Too me, they seem awkward to use. In many parking situations, you may not have room to even open the tailgate, much less slide out a big drawer. Say in your garage where the truck barely fits, you need to grab the kid's basketball bag and shoes that were tossed back there because hauling sweaty teenager athletic funk back in the cargo area keeps the interior a lot fresher.
In a normal truck, that front corner of the bed closest to the driver's door is such a convenient spot to carry stuff. The issue is not a deal-breaker, but it will annoy me and make me think of my CT as being less than the perfect design it could have been (for how I will use it).
I seem to be the deep minority here on this topic. I suspect part of it is the majority of people here have never owned an actual pickup truck. Another source of strong opinions seems to be the beliefs that the side sails are
necessary for structure. Also, I see the large majority of pickup trucks these days driving around with tonneau covers on them which is similar in terms of the loss of convenience. So statistically, Tesla has made the right choice in favoring aerodynamics (for range) over convenience of access to the cargo bed. Its just not the choice I want.