Vaporwave didn't start as a joke. It actually had ideas and philosophy behind it. Check out Ferraro's interviews circa Far Side Virtual release. I think Vektroid also has some interiews somewhere discussing the ideas behind Floral Shoppe.The thing about Oceangrunge is that it didn't have any strong ideals behind it. The name came out as a joke, 5 people or so found it hilarious and with aesthetical potential, made up some quick bullshit to justify said hipotetical aesthetic and made music around it. That being said, I really like Sea of Dogs' Weak Waves