You can't have a correct vision of Italian music (staying only on that subsubsubcategory) of the 80s, 90s, 00s, 10s and 20s like that, at very best you'd end up ignoring significant artists and whole genres.
Wow it's the first time that I don't know part of what i'm talking about and i'm still right...
MySpace is mostly erased (prominent Italian musicians for some music waves of the 00s and 10s were there), some sites are erased, what pertains to radio and television is mostly not indexed on the public internet and there's significant digital divide between genres. In the Italian context, you'd end with a weird pantheon of rock, rap and popstars and not much else left, in conclusion you would... expunge significant artists and whole genres from results.
All correct, it was also one point raised by the reviewers. They had some suggestions about temporal centrality, but in the end I didn't followup on that because this centrality analysis was just a descriptive part that didn't really support any of the primary nor secondary claims in the paper.