brent advantages over gnome-screenshot?
I don't know about gnome-screenshot yet, so I can't say what the advantages are.
I've always used spectacle and met flameshot yesterday, so it's new to me.
I support forums in my country, and using spectacle for screenshots, it's always been necessary to use inkscape for markup and write annotations over the images, and flameshot gives me everything I need.
Take a look: