At one time, a corner had a roll out cart with a bench mounted tool on top. At one time, a corner was home to a large garbage can. At one time, a corner was the location of an Oneida dust collector. Until recently a corner was home to my Festool CT-36 with boom arm (for sale).
At this time one corner is for the storage of tall boards and plywood, including left over pieces.
In the other corner, I am planning to use it now for an old RAM Rockwell radial drill press when it arrives. You need a lot of room behind the spindle to allow the back and forth movement and so that is what the corner space will be for. A limitation is that you do not have a lot of room on each side before hitting the wall, but I will have the fixed table flush with surrounding counter tops, and with the spindle extended fully forward, that is about 60 inches from the corner, and with the large support of the fixed heigh table and surrounding supports, I will be fine. I did the math, hopefully correctly.
The main thing I have never used a corner for is cabinets.