Replying to Foam Core Myth

I was in the shop the other day and i had a pretty large debate with the ski techs about the core in 1080s. But pretty much he convinced me that the 'foam' core isn't really foam at all. It's poorly titled and commonly misinterpreted. Really i guess its a pretty durable and long lasting composite. So it might not be as bad as we all make it out to be. I dont know, but i thought i'd bring up this stupid issue up again....any thoughts?