Human development is the development of labor saving practices (i.e development tools and methods) that liberate humans and labor to do other things. In this case "good software" is bound to that it 's efficient enough to run on the system and do it's job and not slow down the whole system unjustifiably. Why on earth would anybody go full performance optimization autism mode, spending hours grinding down fractions of efficiency out of code, when one couldn't even notice the difference between it and less optimized code running on the target system? One could spend all that time to do something actually productive for the project like a new feature or do something entirely else. Those earlier game and software devs would have killed for hardware that didn't require everything to be custom built and optimized to a T. Not having to optimize everything to to a max doesn't produce "slop", it produces efficiency.