Who is actually using the GUI elements mentioned in the article? Emacs is a comfort zone where I don't need the mouse. >...buttons could be improved with rounded corners...
I would worry if people started moving away from Emacs as text-centric. My biggest complaint with VSCode (which I do fully expect to take over and to which I will one day presumably have to migrate) is that there's so much damn UI for things. The terminal window isn't just a buffer of text like everything else, it's its own ungodly window that pops up differently. Most extensions are primarily UI instead of keyboard…
They're in a bind because they are trying to straddle a market where you've got emacs an vim users to one side and Visual Studio users to the other. Some ability to customize the UI, even if it were provided by a plugin, would be helpful.