I've genuinely never seen anyone outside with one; I haven't even seen anyone online mention them outside vague memes I do not understand.

I don't use TikTok or any of the hyperconsumerist social media platforms.

South Park did an entire episode about them about 3 months ago.

I've seen them around, but they're definitely not popular with anyone I know.

I see them outside. I live in a big city though which may explain it.