Physical USB communication introduces slight latency. For time-critical applications (like high-frequency trading bots or real-time CNC machining), the round-trip to the physical USB port adds microseconds of delay. Emulation moves the authentication into RAM, reducing access time to the license data to near-zero latency.
Industrial Automation: Many older PLC programming tools require 1990s-era hardware keys. Emulators allow these tools to run on modern Windows 10 or 11 laptops. Multikey Usb Emulator