Your only real use for the title bar is a drag zone. Effectively a button to hold down. It doesn't need to occupy the entire horizontal width of your screen to do that. Gnome applications still show the same text information, they just have added buttons there as well to waste less space. You still have ample drag room.
If a program doesn't have enough room for buttons or makes their CSD menu buttons obscure that is a design failure distinct from the bar itself. It is just a space saving measure. While screens are bigger, the vertical area is the premium, and wasting a 15px+ of it on an average of 20 characters of text and two buttons should be somewhere to look for improvement in.