themes, plugins, ridiculously easy custom configurations/build commands etc you can even control the window manager from config files if you want to, its insanely customisable
lacks support for alot of things
edit: trying to sound less snarky, but do you have alot of examples?
i could see these criticisms arising from a quick glance. or we may have slightly different definitions of these terms. which is fair enough.
imo geany’s ratio of features to weight is remarkable, perhaps singularly so?