True, but most people don't even know what the term even means. Most people keep one hand solidly on the mouse and one hand on the left side of the keyboard. Properly do the matrix on that (which isn't terribly hard since game developers have been designing game controls to minimize matrix...
Most non-nkro keyboards are minimum two key rollover (all combos of 1/2 keys work, some combos of 3 or more fail) and maximum 6 (no combo of 7 or more keys goes through).
Whether or not the combos of 3/4/5 keys that fail matter is a matter of debate.
Razer skipped out on the diodes for...