I realize that the build limits are probably based on desktop 3D Printer volumes. However, people are using TinkerCAD for much more than just designing small objects. I love TinkerCAD for it's ease and simplicity. In fact, it's my go to CAD application for most projects now. However, if I want to think BIG... I have to do some sort of conversion in my head to make it work. Example: If I wanted to design a doghouse... it won't fit (unless I use inches as feet). Then I can design the whole project... I just need to constantly remind myself ("6 inches in the real world is actually only 1/2 inch in TinkerCAD" and so on). I've done some pretty large scale designs this way... but I think it's time to realize that TinkerCAD has moved beyond 3D Printers, and make larger build volumes (thus larger grid divisions) a standard feature.
Increased Scale for LARGE projects