Ha! And to think that I always thought that the typewriter sounds thing was a gimmick. People actually use it. Wow!
I live and work in a very quiet environment. I even go to extremes when assembling my own computers to keep them quiet. And the speakers stay muted. During the summer I can, literally, hear it when a snake slithers past the birdbath outside my window. So no typewriter sounds for me. It's either quiet, or at night I (sometimes) don headphones and listen to music.
I write database software for a living, so duplicating data offends my senses on multiple levels: version control and data integrity. Which doesn't mean it never happens - because you're right, some tools are better at some tasks than others, and sometimes that makes the duplication worth it. I just draw the line in a different place.
I do have a better appreciation for wanting to control the appearance. A lot of what you speak of
can be done in many applications, but some make it easier than others.
And that last paragraph is one of the factors about YWriter. It's not just that it's not foofy, it's that it's stuck. Everything is right there in your face all the time. And, from my perspective, it looks like a database form, so it looks like work, not writing.
I like the fact that YWriter has all those capabilities for tracking things about the story, but I don't want them all in my face all the time. I want to be able to adjust an interface to suit myself, because we all work differently. I like functional, but I don't find it functional to bombard the senses with a gazillion choices all the time, that overwhelms the senses right when I really don't want it. (This is one of the things that that immediately turns me away from LSB and the like.)
I am sure I could get used to YWriter if I spent long enough working with it, but then we come back to the fact that it writes RTF - no styles. That's a deal-breaker for me. It's why I don't use Scrivener. This comes back to wanting to change how things look. With styles I can do that easily, and that's what I want.
So, for now, I continue to work with collections of LibreOffice documents and folder structures.