Honestly, all the ideas explained in this article have been richly used in China. The excitement and extensive usage of groups with nearly all of your classmates, colleagues, families, random meetups and occasional affairs.
You probably will find it noisy when you have to manage tens of groups and hundreds of users in each group. Then, the app is not only for tight connections but weak connections in business and personal interests.
This is what happened with WeChat 2 years ago.