Thanks for drawing attention to this discussion. The following may or may not be worth the reader’s time. 
Expressivity has become an issue for me in recent years. I’ve done instrumental electronics in the style often tagged online with e.g. the trio of ‘ambient’, ‘experimental’ and ‘electroacoustic’. Those words are terrifically broad, but we have an idea of the foremost sound that they happen to have come to characterise. I’ve used lots of choral samples and field recordings and other textures. I still come at doing music with such material in mind, but I don’t know how to use it to express some themes - parenthood, emotional insecurities, other personal-life stuff that I feel increasingly compelled to vent somewhere - to my satisfaction.
When I’ve made instrumental music it’s partly been a kind of yearning for some impersonal organic texture, for a total absorption in some idealised (and totally unrealistic) macro-level natural landscape. A bit like sitting somewhere and just listening and sensing (even though the music doesn’t ‘sound’ like that at all). Whether as method and metaphor that’s cool or foolish or problematically flawed, it doesn’t so much get at that personal-life stuff. In other words, sticking in a few lyrics obviously tends to establish a closer narrative relationship to this or that memory or message than does simply telling (oneself or others) that this drone track is ‘about’ something. So I’m turning to lyrics and singing (which I’m not very good at but who cares) and am trying to bring about some kind of middle ground between musical material as I know how to make it and something with lyrical significance. I think that area leans more towards the former, as so far I’ve structured songs fairly freely. There’s also an undeniably vain thrill in considering myself a singer-songwriter. I’m an impatient amateur, but in truth I’m the same with the instrumental stuff, merely a bit more experienced.
In short, I find it enjoyable to be applying my preferred processes to songwriting, something less familiar.