At this time, the industry was shifting from older Arm7TDMI and Cortex-M3 cores to the more complex Cortex-M4 and Cortex-M7 architectures. Version 4.74 was a robust release that offered support for these newer cores while maintaining backward compatibility that was critical for long-term industrial projects.
If you need v4.74 only for its compiler (ArmCC 4.1 or 5.06), you can install and then: mdk-arm version 4.74
MDK-ARM v4.74 is a complete software development environment that integrates several core technologies: At this time, the industry was shifting from