You can add motors, tanks, and conveyor belts that react in real-time to your PLC code.
However, the use of such keys is not without controversy. In the automotive world, independent mechanics often argue that manufacturers obscure these "claves" to force consumers into expensive dealership service centers. This has led to legislative movements, such as the "Right to Repair" acts, demanding that manufacturers make diagnostic codes and tools available to the public. Similarly, in the gaming world, the gray market for activation keys can lead to revoked licenses if the original purchase was fraudulent, leaving the end-user without access to their simulation software. clave de pc simu