>> Are the encryption methods offered by those 10 to 15 years old
>> hardware engines still relevant in today's networking anyway?

> Yes, of course. [...]
> Look on X1000 CPU PA6T-1682M features: [...]
> X5000 P5020 SEC engine: [...]

Thanks. If there are open-source Linux drivers for these acceleration and encryption engines, using them as a template for MorphOS/OS4 drivers should be possible ...skills, interest and time/priorities permitting.