Circles is group chats (WhatsApp, or whatever's popular in your neck of the woods), which I'd argue is how (most?) people in 2025 actually do “social networking.”
It's how people talk to groups of dozens of people at a time: friends, neighbors, acquaintances, the parents of your kid's school mates to discuss school stuff or to setup a birthday party… coworkers if you include more work oriented chat apps.
I have dozens of such groups, some with photos of kids around a birthday cake that I'd never have put up of Facebook (if I still used it).
If that's not social networking, I'm not sure what is.
Circles is group chats (WhatsApp, or whatever's popular in your neck of the woods), which I'd argue is how (most?) people in 2025 actually do “social networking.”
Instagram/TikTok/Xitter is… something else entirely.