Okay, I get it.
I would say, though, that, while I'm not an expert on the subject, I suspect most plates of the non-paper, non-plastic, non-metal type are made of cheaper materials than porcelain, even allowing for the fact that "porcelain" is a vaguely defined term. So I think you could say that plates are "often" made out of porcelain, but not that they're "typically" made out of it.
If anybody here is an expert on plates, though, I'd be interested to hear your take on this.
I would say, though, that, while I'm not an expert on the subject, I suspect most plates of the non-paper, non-plastic, non-metal type are made of cheaper materials than porcelain, even allowing for the fact that "porcelain" is a vaguely defined term. So I think you could say that plates are "often" made out of porcelain, but not that they're "typically" made out of it.
If anybody here is an expert on plates, though, I'd be interested to hear your take on this.