Even according to that document, idempotent methods still can update resources as long as the representation doesn't change: > Again, this only applies to the

Even according to that document, idempotent methods still can update resources as long as the representation doesn't change: > Again, this only applies to the result, not the resource itself. This still can be manipulated (like an update-timestamp, provided this information is not shared in the (current) resource representation. This means that tracking is still could potentially affect some stuff, but honestly not by much.