I want to have all my files in the cloud but I don't want to sync them all to my desktop computer. I want to be able to sync only the files I need for the projects I'm actively working on.
I agree with the sentiments I see in the comments - this is table stakes not something to be considered. Creative Cloud storage is effectively useless without this.
This is the top reason we're not buying into Creative Cloud as an organization. Most of our computers are lightweight/small hard drive, so without this feature most of Adobe's other great products are inaccessible.