""If you carry that type of load on a regular basis, a longbed is more convenient, however a shortbed gives you more payload and has benefits of a shorter truck.
It is all about what your needs are.""
I think this is exactly right. I have many projects, but, they are all done on MY time. If I need to carry something in the bed I won't do it in inclement weather (if it won't fit under the bed cover). I carry all kinds of 4x8 sheets, 2x stock in 8/10/12' lengths with no issue.
I really do think it IS about what your needs are and we are all different.....and then there's the garage