Hi, I’m using the GNOME desktop with the Yaru theme for some time now and I would like to discuss about thick windows decorations. This is clearly not a problem of Ubuntu alone, but the theme is where Ubuntu can deviate from upstream.
Thick windows decorations have a clear purpose in GTK3 apps that use the GTK3 header bar, and I suppose they are maintained so thick also for other apps for consistency purposes. It is my intention to question such choice, as it comes with higher screen usage. This is mainly a concern on laptops, where the screen size is lower. Part of the screen on the top is wasted for mostly blank space in the top bar and for the window decoration.
While a better use for that space coming from upstream is desirable, I think that making windows decorations which don’t use the headerbar be thin would be a sensible space saving policy.