Plywood instead of drywall

[TechBSC]

Hi,
I'm going to close up a wall that is partially open.
Maybe a dumb question, but I don't have to use drywall if I'm going to cover it with grooved plywood, right?
It should be enough with OSB behind it (to be able to attach wall objects)?

Disadvantages with my plan?

 

[surris]

Hello,
I'm sealing off a wall that is partially open.
Maybe a silly question, but I don't have to use drywall if I'm going to cover it with grooved plywood, right?
It should be enough with OSB behind (to be able to attach wall items to it)?

Disadvantages with the way I'm thinking?

No, drywall is for getting a nice surface for wallpapering/painting or for fire protection.
There's probably no disadvantage, but it's unnecessary.