What’s something niche about the early 2000s that most people have probably forgotten?

I was just reminded of this when I was commenting on another subreddit about a song I heard when I was in high school in 2006:

Remember when we sat around all day listening to the radio on our CD boomboxes, waiting for a specific song to come on so we could audio record a few seconds of it on our flip phones and have it as a “track”? The radio announcer always ruined it by ending the song too early. ❤️‍🩹 I have vivid memories of doing this with “Heaven” by Los Lonely Boys, Papa Roach, Kelly Clarkson, Ryan Cabrera, Seether, etc.

What’s something niche that people now have probably forgotten about the the early 2000s?