By "more things" the author doesn't mean "inefficient work that produces no value." She actually gives the example that her old code produced solid squares wit

By "more things" the author doesn't mean "inefficient work that produces no value." She actually gives the example that her old code produced solid squares with a border & the new ones are generated with some visual effects. Realistically, she could have produced some blur effect twenty years ago, but there were no good toolsets for doing it. Because of the "improved tools", developers can now create that effect with one or two lines of code. Summary: "improved tools": These tools enable easy access to advanced functionality. "expected": Users expect beautiful tetris, not just solid color with a border "achieve the same goals": Really, the goal is to create a playable terris. The definition of playable has apparently evolved in these twenty years. As an aside, generally I agree with your comments about the bugs. Libraries are implemented in python (bugs here), python is implemented in C (bugs here), C has a compiler (bugs here), ...