My current Cortex-M4 project is about 40kB of code, and it runs at 48MHz. If I needed more performance, would just get one with a higher clock-rate. 64-bit has

My current Cortex-M4 project is about 40kB of code, and it runs at 48MHz. If I needed more performance, would just get one with a higher clock-rate. 64-bit has zero advantages in this context. Also, worth mentioning that our safety-critical auditor recommends staying on 90nm or larger chips. That’s many of the Cortex chips, and the same as the original iPhone.