[remslave]

Bright text on dark backgrounds is unreadable garbage to me, like a kaleidoscope of strokes and shapes. I think it is because of astygmatism, not sure.

When software doesn't provide a light theme, I can't use it at all. Thankfully websites are easy to fix with browser addons... ffmpeg documentation in particular looks so bad by default in my opinion.

You should always give the user a choice because it's usually very trivial to make a theme and saves everone trouble down the line. Finding the option to switch can still be a pain sometimes which is silly.