Nobody rsvp’d for my sons birthday

My son is turning 10 this Friday and he invited his entire class to his birthday party on Saturday and not 1 parent has gotten ahold of me to rsvp if they are coming or not. Are rsvp’s dead and do people just show up? Or does nobody rsvp to anything anymore? Im just not understanding and I don’t want him to be upset that nobody came from his class. Of course we have friends and family that are coming but I know he wants his friends from school there.

We all want our kids to have the best birthday and he has such a big heart.

No matter what we are going to make his day incredibly special.