> We can save much more of a user's time by creating simple, intuitive interfaces than we can checking cache misses (in most modern development). And at least

> We can save much more of a user's time by creating simple, intuitive interfaces than we can checking cache misses (in most modern development). And at least for regularly-used software, you can save even more user time by not optimising for the first five minutes of usage but for the long-term usage. Keyboard shortcuts are a good example for this: They are mostly not simple and certainly not intuitive per se (why does Alt+Tab switch windows in particular?), yet once you know them, they do save a lot of time.