There are many very "serious" ones, but they won't replace DAWs because the audience for a programming language tool for computer music looks is very different.
A few off the top of my head that are used and/or made by serious computer music people: Common Music, Nyquist, Euterpea, Open Music, Common Lisp Music, Snd, Csound, SuperCollider, Chuck, Perry Cook's STK, and my own Scheme for Max and Scheme for Pd.
My own Scheme for Max is (modesty aside) interesting because it takes one of the serious code tool lineages and enables running it in a DAW. It allows you to port Common Music algorithmic composition code into Ableton Live through Scheme for Max. You get the ability to work in and sync up with Live, but if you want it, all the potential complexity and power of Scheme and Common Music.
https://github.com/iainctduncan/scheme-for-max
A few off the top of my head that are used and/or made by serious computer music people: Common Music, Nyquist, Euterpea, Open Music, Common Lisp Music, Snd, Csound, SuperCollider, Chuck, Perry Cook's STK, and my own Scheme for Max and Scheme for Pd.
My own Scheme for Max is (modesty aside) interesting because it takes one of the serious code tool lineages and enables running it in a DAW. It allows you to port Common Music algorithmic composition code into Ableton Live through Scheme for Max. You get the ability to work in and sync up with Live, but if you want it, all the potential complexity and power of Scheme and Common Music.
https://github.com/iainctduncan/scheme-for-max