My application is simple. And not very exciting, but is a struggle I've had for a long time.
A non-destructive pull test of a small steel plate attached to an aluminum extrusion.
The pull strength requirement is larger than what the largest rare earth magnet can hold onto for that surface area and material. All a factor of the magnet's strength, surface area, and thickness of material attached to, and I'm sure other things.
If these "programmable" magnets could be used to make a stronger magnet in a smaller area, it would work well for this.