I kinda get it now. Perhaps your expectations were that there would be a ton of visuals (i.e. commercials, parties, etc.) focusing on Prince and the song on New Years Eve..? Yes... I would agree from personal recollection. However, I would still suggest that radio stations (generalizing from my own personal experience) were blitzing the song--especially late that year through early 2000. Plus, I was not a big MTV, VH1, etc. viewer at the time but I believe music networks were doing the same.
While I would agree people in general were not celebrating Prince or his song, I would re-emphasize he and
1999 were getting tons of overexposure from the music broadcasting community. Additionally, I would add that too many people's primary focus all year, leading up to New Years Eve 1999, was the irrational fear that technology would implode at midnight that particular night. I think it is safe saying a 'lot of people' were more mentally consumed by an imaginary catastrophe happening in their lives than remembering and celebrating Prince.
It is hilariously ironic. The underlying theme of 1999 was
nuclear judgment day, which was a real, worldwide, human existence-altering looming threat at the time Prince released the song. He was singing about how precious people should have been treating life on this planet. Prince used '1999' as a metaphoric pre-doomsday. Yet, too many people considered the actual turn of the century as a terrible doomsday simply because older technology had been based on two instead of four yearly digits. Crazy.