Never Make Dragging the Only Path

This is not a rule about how a drag feels — it is a rule about whether the outcome is reachable at all without one. Two neighbouring principles here already govern drag quality: "Clean Drag Interactions" suppresses text selection and inert-ifies the page during a drag, and "Drag Physics" tunes velocity and damping on release. Both assume the drag is happening and make it better.

Neither asks the question this SC asks, which is what a user with a tremor, an eye-tracker, a head-pointer or a switch does when press-travel-release is the only route to the outcome — for them, the answer today is "nothing". So keep the drag; it is a fine accelerator. Then add a path that a single pointer can complete without travelling: ↑ / ↓ buttons on each row, a "Move to…" menu, or arrow-key handling on a focused grip.

The alternative must produce the same result, not a degraded one, and only "essential" drags — a signature pad, a free-form canvas, a map pan — are exempt, because there the path IS the content.