>What is that? Your game needs sprites, so you could write code that loads the one graphics format you need at the 2 or 3 sizes you need. While doing that you

>What is that? Your game needs sprites, so you could write code that loads the one graphics format you need at the 2 or 3 sizes you need. While doing that you decide it looks hacky so you add support for more formats, better scaling, ... suddenly you have gone from doing that one thing your game needs to something that supports everything every game on the planet might need but usually doesn't. By the time you have done that for every system in the game, you now have an "engine" but are burnt out on the project.