I’d guess the simple answer may be that people don’t care/know, but for those that have ditched Facebook for whatever reason, yet still use Instagram, it’s a little surprising.
Is it partly a result of it being a more focused/limited form of social media that filters out some of the stuff people didn’t like from Facebook?
Never watched a single reel/story or what ever they’re called but I’m still on instagram. Why? Because it’s my only social media account my friends know of. Also I met my SO there so I guess it has some sentimental value aswell. Don’t use the app though.