Making new partition for back seat/trunk area

Looks like a decent option (had to Google it didn't know what it was lol), kind of just looks like the factory stuff though...? And it does deteriorate over time, you have an idea of how much time that might be?

I would think that it would out live both of us unless it got soaking wet.
Hardboard is another name for it I think.
You would be familiar with it as "pegboard" maybe. Except without holes.
Just my idea. I'm trying to remember what I may have used for package shelf topping.
A different need anyway. Wrong thickness.