>> Because there IS a limit to how much can be stored on the client side PC. Last place I worked, we would get notices from corporate when we were nearing our limit.
Are you sure about that? That sounds more like a server limit. If you were keeping email on your client the storage limit would be determined by your disk capacity. This would vary from one machine to the next and most machines have large capacity drives. The machine I’m using now is about 7 or 8 years old and it came with an 80GB drive.
I believe that client side limits were set by corporate policy. I do not know their reason for that.