I don’t see any problem with it being referred to as “forum” we have always called it forum e.g Bitcointalk forum, altcoinstalks forum and yet we all understood what we were talking about so why the need to start differentiating it into social media or not?
It's not about Bitcointalk, Altcoinstalk or crypto forum. My outside career has its global forum where we discuss, share and talk many things about the development, the set back and common things and we can never discuss such in social media and I believe that's why they call it forum and not social media, the two are completely different things.
The forum discuss in depth things while social media might just share few things and some information discuss might even be wrong and no one will correct them but forum, you will get corrected immediately for spreading wrong information about what is been discussed for that time.