[notahacker]

And at the other end of the scale, regular old digital tooling (sequencers, samplers, VSTs, chord transposers, autotune, DAWs and beginner DAW alternatives) has been doing the more important stuff to allow people that are not skilled musicians to produce something resembling a song for a long time before LLMs. Some in a more user friendly manner than others.

Stringing together some cliches and googling "what are some common chord progressions?" was never the barrier to humans becoming singer-songwriters and computers lowered more important barriers some time ago, though credit where it's due, the LLM is reasonably good at picking lines that rhyme.