A lot of people are disagreeing with you but I certainly concur. Sure, there are ways to work around it, but this is a $6,000 computer and you could get more storage than this in the 2004 iMac.

I refuse to believe that meticulously emptying out your trash and downloads folder so that you can continue to squeeze by with 256GB is now acceptable for ultra high end, "I don't know a single person who can afford this" computing.