New Delhi, Nov. 28 -- Shantanu Anand, 33, stays in touch with friends through "pebbling". Every night, he opens his Instagram DMs to see the reels his friends have sent him during the day. He reacts with emoticons, called reacjis, forwards some to other friends, and moves on. That's the full arc of most of his friendships now: reel, reacji, repeat. In some cases, he feels it's an improvement over not being in touch altogether. His experience is far from unique. Last week, Instagram's own broadcast channel, What's Good on Instagram, spotlighted a reel by @thefunfashionista, titled "Are you even best friends if your chat doesn't look like this?" The video-now sitting at over half a million likes-shows a chat window between two users that's ...