Ohhh this looks very cool. Thank you for sharing! Will dive into this over the weekend.
It's almost week-end! But I'm pretty sure these were shared merely as historical anecdotes, and that Suno 4.5 is the bleeding edge here...
In a similar vein, there is https://aminet.net/package/mus/misc/AlgoMusic2_4u.lha, from ~96 or so.
https://en.wikipedia.org/wiki/C.P.U._Bach