I've spent way too many hours over the past week evaluating the various notation software and syntax alternatives. Looking to transcribe notes from music lessons, and eventually play with algorithmic composition.
Humdrum's syntax and style just seem to make significantly more sense than anything else, and the main difficulty that I see so far - remembering what the various letters mean - is something trivial to learn via flashcards.
Specifically the main advantage I see is that humdrum syntax lets you easily maintain a sense of time going by, and where you are in a piece. I also love that it is designed to make you own microformats, which if I go with it I may end up eventually doing for the marching snare drum, as well as makes it easy to play with coloring and alternative output formats (for example, I'd like to make all notes played with the right hand red.)
However, in many places / FAQs, this type of use seems to be warned against. I'm wondering if someone could elaborate on why, and if those statements are actually still valid now that things like verovio seem to be pretty advanced.
Specifically if the only issues are with the visual beauty of printed output - e.g. stuff that only really matters if you are going to print and sell sheet music, like kerning etc. - I don't care, but if there are some functional things that are relatively commonly used but just not easily or at all doable for some subtle reason(s), that would make me pause.
Also, I think I noticed a few peculiar-to-percussion symbols not yet included , is stuff like that relatively easy to add?
 Stuff like some alternative heads, see