My whole job is big-model GenAI music stuff and I'm still unclear what counts as "generative." Are loops in Ableton generative? What about that GarageBand drummer thing?
So it's generative in the way "generative design" is, but not oriented towards optimising for a goal, if that makes sense.
I don't know about Ableton loops but I've met some drummers like this but they are usually not all that popular. So I am guessing that is not what GarageBand is aiming at, in quite the same way. ;-)
Though perhaps that is generative in the sense of optimising towards a goal; I've not used it.
Eno's work was initially done with the Koan and I think he ended up in a sort of symbiotic relationship with the developers. It was a big deal for a while in computer music magazines in the 90s.