I'm not writing code, but I edit video and write text on a 16:9 and have never thought that the screen format had anything to do with anything else than video crops.
It’s less of an issue with larger screens, but with small screens 16:9 gets vertically cramped really easily with all of the taskbars, menubars, toolbars, status bars, titlebars, etc eating up that space like candy. Open up an IDE like IntelliJ or Visual Studio (not Code, full fat VS) on a 13” 16:9 screen and this problem becomes immediately evident.
Most devs would probably prefer an ever taller aspect ratio than 16:10 but laptops with those screens that fit other needs are hard to come by.
It’s one of the reasons why I think the notch was actually a net positive on MacBooks: Apple added a strip of vertical pixels to 16:10 which acts as a “nook” for the menubar and notch to live in, making it effectively taller than 16:10.
Most devs would probably prefer an ever taller aspect ratio than 16:10 but laptops with those screens that fit other needs are hard to come by.
It’s one of the reasons why I think the notch was actually a net positive on MacBooks: Apple added a strip of vertical pixels to 16:10 which acts as a “nook” for the menubar and notch to live in, making it effectively taller than 16:10.