The UX sin that bothers me the most lately is when I can enter data faster than the device can handle and it doesn't buffer. The example I gave last time is run

The UX sin that bothers me the most lately is when I can enter data faster than the device can handle and it doesn't buffer. The example I gave last time is running calc.exe, then hitting enter and typing a formula. On Win10 you'll lose keypresses and half the formula, but not on the older versions. It used to be a very convenient way to do some quick maths without even interrupting my workflow, now I have to wait for it. It's even in some games I've played recently, where I'm in a menu and hitting down twice then a button will sometimes ignore the second press because it's still playing a 'move the cursor' animation. I was pleasantly surprised last time I snuck a look at the screen in my local post office where I saw an ASCII terminal UI full of text with hotkeys. There is a mistaken belief that complicated is bad, but in a job where you spend your whole day all week long it can be very beneficial because everyone can be a power user.