Probably worth mentioning Jacob Joaquin [1] who did this stuff in Csound back in the 90s. On one of his patches I based a generative music system for a game, it was the "Harmonic tree" - very similar to the system in the article - repeated multiplication by integer fractions at each branch.
Using simple timbres (like flute/organ/sine) you can make big but crystal clear sounding chords, and then slowly changing one "note" at a time you get an ever evolving soundscape that blows anything "Eno" off the map. Its in a sweet creative area between composition and additive synthesis.