Why SMD?
I need SMD because I am making a 32 pin DIP to 28 pin DIP adapter.
32 pins on the bottom of the adapter pcb connect to a
32 pin DIP socket (on the old/legacy board).
On the top of the adapter is a 28 pin SMD DIP socket.
With through-hole pins,
the bottom pins will penetrate the pads of the top side 28 pin DIP socket.
With SMD,
the top DIP socket can be exactly above the smd pins on the bottom side of the adapter.
I could use single row through-hole pins and offset the new chip sideways
but surrounding components prohibit that.