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These will allow the operator to directly control the acceleration and deacceleration of the elevator, hence providing job enrichment for the operator and removing any temptation for building owners to revert to the old (and now illegal) automatic method of operation.
We certainly see a deacceleration of benefit in that area as the retail price differentials becomes the headwind.
In the event of sudden deacceleration (e.g. a crash) it is likely your bag will become a potentially deadly projectile.