> I wonder what other purposes the DSPs could be used for.

I'd say anything DSPs are suited for in general, for instance audio and video processing.

> Surprisingly good results on the A53.

You mean its Dhrystone performance per clock located between Cortex-A8 and Cortex-A9?

> I could still see this going solo.

So can others:

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=3&topic_id=9647&start=37