Can new pine planks be nailed over existing plywood?

Q: My upstairs living area had carpet installed 15 years ago. The existing staircase is covered with carpet. Due to the cost of oak.. can new pine planks be nailed over the existing plywood?

A: Yes you can nail it down.

I’m not so sure you will find decent pine for much less than decent 3/4 oak however, except for getting much greater widths.