light mode

I read somewhere that dark mode was by large the choice of smartphone users (over 80%!). I find this figure suspiciously very high. And it has me wonder how many people actually use dark mode on macOS. I wonder because each time Apple promote macOS or macOS Preview, they have nice light mode...

As per the title. I like the transitioning wallpapers depending on time of day, specifically the light/dark ones, but the wallpaper doesn't transition unless im in AUTO mode for overall light/dark mode in macos. Is it possible to have the wallpaper transition without having the whole OS...