What is "meaningful"?

I was listening to the Accidental Tech Podcast last week and Marco said that the iPhone Air has lower penetration, after 1 year, than EACH of the 12 mini and 13 mini _currently_ have. Among a tech audience.

We just had to replace a family 13 mini and it sucks to have to go with a huge modern phone. Personally, I'd also prefer a mini if it had the best cameras.