I recently prepared a small presentation to explain my job to kids in secondary school. I realized many of the products I have worked on are completely obsolete and most of them lie in garbage somewhere. Of course I still fondly remember that hard to fix bug, 10x optimization, smart code trick. But in the end little of it remains but in my own memories. In would say "half-ass it" and use "the other half" for some something truly useful. I am quite far from being able to do it though.