Here's a robot video that I found interesting:
Printing a hollow cube 30mm x 30mm x 30mm without any support material. The part is printed in PLA with 150 micron layers, 100% infill.
Being able to bridge 25+mm gaps should allow me to print parts without having to use support material or a dual extruder machine. It's relatively easy to design support posts that can be removed later. None of the popular gcode generators have been able to automatically create practical support material.