Musicians

I have no idea if this is relevant considering my last experience with it was at least 20 years ago, but I used to use Finale. I came across some old files a couple of months ago and realized that I'll probably never be able to open them again lol.

I do use LilyPond. It's excellent for transcribing music, less so for composing new music, but that doesn't stop me from using it for the latter anyways. 🙃

Personally, with graphical software like MuseScore, I always end up just throwing dots into the score sheet without thought and it just always sounds bad, especially when I try to write multiple voices.
LilyPond has higher friction to note entry (when not transcribing) and it also forces you to spell out what kind of note it is that you're entering (i.e. it's c, d, e... not just a dot), so it makes me think about the notes I enter, which ended up actually making me much quicker at writing anything that sounds good.
You'd believe I could just stop being a dumbass and also use my thinky brain with MuseScore, but I have tried repeatedly without much success.

What I also appreciate about LilyPond is that it deals well with the complexity of an orchestra score.
For example, it often happens that you want multiple instruments to play the same snippet of notes. I assume, graphical tools also have a feature for that, but with Lilypond, it's quite natural to just throw those notes into a variable and insert them wherever.
LilyPond also has a full-fledged programming language underneath, which you can tap into to script things, if you want.

I should maybe also mention that I am a software engineer, so I'm appreciative of being able to script things, but I also work with text every day. For example, versioning of files I can do with Git, which I use every day anyways.

Things that are not so good about LilyPond for composing:

• Presumably, most people would not find the higher friction for note entry as helpful as I do.
• Playback of what you've composed isn't great. It can generate MIDI files, which you can listen to with a MIDI player and that's it. That also means you're limited to the instruments that are in the MIDI standard, unless you do shenanigans with swapping out samples in your MIDI instrument library.
• There is a learning curve and especially at the start, there is relatively much to learn before you can actually write a score and listen to it. I don't feel like it's too bad compared to how much time you're gonna spend using the tool, but it just absolutely cannot compete with the ease of placing dots into a score sheet.