Bijan’s “People Tagging" issue has been addressed by Instagram! I’ve been frustrated when I’ve @ mentioned someone on an Instagram caption, posted it to Twitter, and because the tagged person has a different handle on Twitter, can’t get notified of the post. I once got an @ message from the mis-tagged user telling me I tagged the wrong person. Instagram’s solution looks like it’ll work well, and they’ve also covered several use cases in cases where Twitter isn’t connected to the tagged user’s IG account. It’s also great to see the team at Instagram working on issues for the Twitter ecosystem even after the API shutoff. They’re definitely building for their users and continuously improving the product’s experience.