Do I attach kitchen cabinets when installed overtop of a hardwood floor?
Yes, there are many good reasons to finish laying the hardwood floor, and then screw cabinets into the floor and subfloor.  There are also some reasons not to do so.

This is an area of ongoing disagreement about the topic:


Hardwood Installer
Patch.com forums
Hardwood Flooring forums


My neighbor was a professional cabinet installer for decades and specialized in high end luxury houses.  His way of telling if the general contractor was a cheap b*stard or a quality contractor was by whether the hardwood was laid wall-to-wall in the kitchen or stopped for the cabinets.

My neighbor is a proponent of laying the hardwood wall-to-wall and placing the cabinets on top of it, screwing where necessary through the hardwood into the subfloor.