I would never use a social network native app, ever, as the category has a history of abusing privacy, poorly utilizing resources or any number of other things.

For business, it's a much easier decision. If I can do what I need to do in a PWA, why futz around with iOS, Windows variants, and multiple versions of Android apps? App Stores are a much bigger PITA than shipping web code, and I don't have the time, budget or care to make a polished user experience for employees.