Option 2 with two catches: it has the power to capture new audiences and holds up years later.
Doggystyle and The Chronic are classics because they're high quality, influential, AND captured new audiences. My mom, for example, was not a fan of rap when I was coming up. I could listen but she would tune it out or tell me to turn it down However, when Ain't Nuthin But a G Thang dropped, she became a fan and branched out into 2Pac and other West Coast rap on her own off the strength of that one album.
Fast forward, they both still get bump and you got kids 18 or 19 rapping it along with 70+ year olds. That's classic to me.