Because they don't actually have time to test it themselves 1000 times. I bet any developer given that time to test his own UX would improve it ten folds when h

Because they don't actually have time to test it themselves 1000 times. I bet any developer given that time to test his own UX would improve it ten folds when he starts to get frustrated with his own design. Data entry UX? Suddenly instead of having everything overwhelming a user you'd get only most used and then have an "show advanced options" button where you get the rest. Charts? Show only important features then rest get hidden behind "show advanced options" button. Reports? Menus to show only most common used reports, rest must go into "Show advanced reports" And so on and so forth. See VLC player options, I think that UI is beautiful, despite it's myriad of options there.