This is an almost existential philosophical discussion about the sheer heart of music. I don't have any opinion on well or not writing of a traditional notated score, but I wanted to express my point of view concerning the conservation of music itself and its reason of being.
Why do people sing? Why do they imitate birds? Why do they enchant in rituals? Why do they dance and therefore produce rhythms...?
Birds can sing lovely (romantic) tunes, but are they in fact? Actually not. Most birds sing a fairly agressive song to let opponents know where their territory is and not to amuse human ears. All the-like forms of 'music' have a reasonable explanation. The question is: is that music as we tend to understand it? So many good composers have tried to imitate these chants and put every detail down in written scores. Why? It would have been a lot easier to improvise on appropriate instruments the calls of animals... But somehow, they wanted us to kow how it is done, to have us remember, to show their mastery or skill, or simply to create a repeatable and identical sound for many generations (almost scientifically).
Is it absolutely necessary to make a written score? Of course not, but it is some kind of certainty that the creative work will survive (be it in dusty archives). Digital versions are always tied to digital means of performance and storage known today. For how long will that be the case? Look at the CD (disappearing). The MD long time ago forgotten... The sampling techniques we all praise today will eventually vanish and be replaced by entirely new ways of playing back on 'computers'. Even that magical instrument will finally be dusted under by history and evolution.
My point is, that there is no real urge or necessity to write scores, but it seems (for now) the most reliable way to preserve your creations. It is indeed a rather slow and tedious job, but it remains the universal storage of music for later performance or study. I'm an old school musician, I even couldn't create a simple song within a DAW. Somehow I need the physical visualisation of staffs and notes to see (and hear) music. The dots and squares in a piano roll don't speak to me at all. And since I'm not a piano player, I can hardly use my limited skills to play directly in a track in order to have a lively performance... I just need my pencil and paper (computer keyboard and screen) to enter my ideas and emotions. Old fashioned or outdated? Maybe, but who cares. It's my way...
Max