The Arm Morello programme demonstrated that CHERI concepts can scale to a modern high-performance 64-bit processor and support real operating systems, toolchains, and applications.
Morello gave research and industry teams a realistic platform for porting operating systems and applications, examining compatibility, and measuring performance. It showed that CHERI could be applied to the most demanding high-performance processors.
Morello remains an experimental platform. Its importance lies in the full-stack evidence and experience it created, not in representing a production Arm architecture.