that's an extensibility symptom. every single game with 'mods' has the same issues that the vast majority of extensible applications have. the core developers

that's an extensibility symptom. every single game with 'mods' has the same issues that the vast majority of extensible applications have. the core developers (hopefully) care and understand about the cost of a cycle, whereas the mod/extension developers tend to care only about how their addition works and expresses itself to the user. the mod/extension developers (generally, not in the case of foss projects) usually lack the scope to understand how their coding decisions affect the rest of the code base, or in the worst cases they lack the understanding needed to optimize something to the point of usability -- so they achieve their small purpose by any means possible, often times in fairly brutish manner, which kills app performance all together.