Isn't that what it's supposed to be? Facebook has the market of young people captured pretty broadly with Instagram. I doubt they would appeal so much to older people if they focused in appealing to younger people.

In the US, sure, but globally they are still growing in almost every demographic.

Yep, and if I remember right, that was the same pattern that the prior dominant social platforms saw before they collapsed.

In the country with the highest value per user to advertisers, yes i'd say this is a huge deal.

If it is 15M US users, that's 4.5% of the US population.