There was no issue when I had but one radio capable of CW.  My straight key and paddles were plugged into their respective ports on the back of my TS-590SG.  In time I acquired an all mode 2 m rig, so a second straight key went onto the desk.  Then the TS-520S and FT-101E followed over a twelve-month period.  Each additional radio increased the number of keys on my desk, and a corresponding decrease of available desk space.