Hard to break it to you, but...
Nobody is using QCObjects.
Period.
Moreover:
> express: insanely fast
Huh, no. It's just fast enough for most things. But if you really need performance, you don't use express. Use Fastify or plain Node.
Personally, I have no problem with CSS. I love CSS.
So, usually it's explaining the others that throwing declarations until they see something stick isn't the right way to do CSS...
I think I guessed it right then. It doesn't "fix" anything, as everything works fine. It appeals your own sense of aesthetics.
For this kind of things, I suggest creating a use style sheet to be installed with Stylus or other similar extensions. GitHub's new UI is... fairly new, so it's subject to change. Updating a Chrome extension can be a hassle.